• Subterranea10,000 Year Clock, United States of America
  • Subterranea108 Tomb Caves, Japan
  • SubterraneaUnderground Project 131, China
  • MineMina 13 de Maio, Brazil
  • CaveCaverna 14 de Julio, Paraguay
  • Mine19-Lachter-Stollen, Germany
  • CaveTunnel de lave 2004, France
  • Cave3N Cave - Namakdan Cave, Iran
  • SubterraneaThird Man Tour, Austria
  • Subterranea816 Military Nuclear Plant, China
  • MineSite Du 9-9bis, France
  • SpringAachquelle, Germany
  • GorgeAareschlucht, Switzerland
  • SubterraneaAbadía del Sacromonte, Spain
  • ShowcaveAbaligeti-barlang, Hungary
  • MineEcomuseu Minero Abangares, Costa Rica
  • SpringAbano Mineral Lake Natural Monument, Georgia
  • MineMuseo Minerario di Abbadia San Salvatore, Italy
  • CaveAbbey Caves, New Zealand
  • CaveFurna do Abel, Portugal
  • MineFeuersteinbergwerk von Abensberg-Arnhofen, Germany
  • ShowcaveAbercrombie Caves, Australia
  • MineAberdeen Maritime Museum, Great Britain
  • ShowcaveAbime, Belgium
  • CaveAbismo Anhumas, Brazil
  • CaveAbismo Oscuro, Costa Rica
  • CaveCueva del Abra, México
  • CaveAbraham’s Cave, Turkey
  • CaveAbrakurrie Cave, Australia
  • SubterraneaAbsalom’s Tomb, Israel
  • SubterraneaAbteimuseum Echternach, Luxembourg
  • ShowcaveAbukuma-do, Japan
  • SubterraneaAbu Simbel, Egypt
  • MineAce of Diamonds Mine, United States of America
  • KarstAcequia del Toril, Spain
  • SubterraneaCaves Ackerman, France
  • CaveGrotta di Acquasanta, Italy
  • ShowcaveCuevas de Actún Kan, Guatemala
  • SubterraneaCuevas de Acusa Seca, Spain
  • SubterraneaAdalaj Stepwell, India
  • SubterraneaAdi Kadi Vav, India
  • SubterraneaAdjimushkay Quarries, Russia
  • CaveAdmiral’s Cave, Bermuda
  • SubterraneaAdmiralty House Park, Bermuda
  • GorgeAdršpašsko-teplické skály, Czech Republic
  • ShowcaveCueva de Adsubia, Spain
  • MineAdventure Copper Mine, United States of America
  • CaveMagharet Afqua, Lebanon
  • KarstLoutra tis Afroditis, Cyprus
  • ShowcaveAggertalhöhle, Germany
  • CaveSaint Anna Cave, Greece
  • SubterraneaSaint Barbara Cave Church, Cyprus
  • CaveSpilia Agia Paraskevi - Aghia Paraskevi Cave, Greece
  • SubterraneaAgia Paraskevi, Greece
  • ShowcaveSpilea Agia Sophia - St Sophia’s Cave (Kythira), Greece
  • ShowcaveSpilea Agia Sophia - St Sophia’s Cave (Crete), Greece
  • CaveChapel of Agia Varvara, Greece
  • ShowcaveSpilia Agio Gala, Greece
  • CaveEklisia Agioi Theodoroi, Greece
  • CaveSaint Andrew the Hermit, Greece
  • CaveSpilaio to Agiou Antoniou, Greece
  • CaveCave Church of St. Anthony, Greece
  • CaveCave of Agios Dionysios, Greece
  • ShowcaveSpilaio Agios Georgios, Greece
  • CaveAgios Georgios Mandelas’s Cave, Greece
  • SubterraneaIepa Moni Agios Gerasimos, Greece
  • CaveSpilia Ag Ioánnis Erimitis - Hermits’ Cave of Saint John, Greece
  • CaveSpilia Áyios Ioánnis Iráklia, Greece
  • CaveSpilia O’Ag Ioannis Kastro - St John’s Hermit Cave, Greece
  • CaveSpilia Áyios Ioánnis at Marathokefala, Greece
  • CaveAgios Ioannis Damialis Cave, Greece
  • CaveSpilaio Agios Mamas - Agios Mamas Cave, Greece
  • SubterraneaCave Church of Saint Nicholas, Greece
  • SubterraneaAgios Spyridon, Cyprus
  • CaveAgios Stefanos, Greece
  • CaveCave of Agios Theodoros, Greece
  • SubterraneaAğırnas Yeraltı Şehri, Turkey
  • CaveThe Glittering Caves of Aglarond, Middle-Earth
  • SubterraneaA GoGo Valkenburg, Netherlands
  • SubterraneaAgrasen ki Baoli, India
  • CaveCueva del Agua, Spain
  • SpringAgua Azul, México
  • MineMinas del Aguacate, Costa Rica
  • SpringManatial Agua Fría, México
  • ShowcaveCueva del Agua in Orbaneja del Castillo, Spain
  • CaveCaverna Água Suja, Brazil
  • ShowcaveGrutas del Águila, Spain
  • CaveGruta das Agulhas, Portugal
  • CaveLes grottes de l’Aguzou, France
  • SubterraneaAihole, India
  • ShowcaveAillwee Cave, Ireland
  • SpringSource de l’Ain, France
  • KarstAin Sahlounout, Oman
  • ShowcaveAin Wazein Cave, Lebanon
  • SubterraneaAir Raid Shelters of Mellieħa, Malta
  • MineAitiks Koppargruva, Sweden
  • CaveAitzulo, Spain
  • MineAJ Mine Gastineau Mill Tour, United States of America
  • SubterraneaAjanta Caves, India
  • ShowcaveAjdovska Jama, Slovenia
  • MineAjkai Bányászati Múzeum, Hungary
  • ShowcaveAkarsu Köyü Mağarası, Turkey
  • CaveVai Akaruru, Cook Islands
  • ShowcaveAkasaki shonyudo, Japan
  • ShowcaveGoa Akbar, Indonesia
  • KarstAkhayat Sinkhole, Turkey
  • ShowcaveAkhshtyrskaya Cave, Russia
  • MineMuseum of Mineral Resources, Japan
  • ShowcaveAkiyoshi-do, Japan
  • ShowcaveAkka-do, Japan
  • CaveAkka Mahadevi Guhalu, India
  • SubterraneaAkköy Evleri, Turkey
  • ShowcaveAktun Chen, México
  • KarstCenote Aktun Ha, México
  • MineAlabama Mining Museum, United States of America
  • ShowcaveAlabaster Caverns State Park, United States of America
  • SubterraneaAladzha Monastery, Bulgaria
  • CaveGruta Alambari de Baixo, Brazil
  • SubterraneaFolkklubs Ala Pagrabs, Latvia
  • SubterraneaCuevas Pedro Antonio de Alarcón, Spain
  • CaveAlawala Caves, Sri Lanka
  • CaveAlayeh Cave, Yemen
  • SubterraneaAlbarracín-Cella Roman Aqueduct, Spain
  • CavePestera Albastra, Romania
  • GorgeGole dell’Alcantara, Italy
  • ShowcaveGruta das Alcobertas, Portugal
  • ShowcaveAl-Daher Cave, Jordan
  • CaveMagh?rat al-Dam, Syria
  • ShowcaveMagharet Al Dawwayat, Syria
  • CaveGrotte d’Aldène, France
  • MineAlderley Edge Mines, Great Britain
  • MineAldrich Coal Mine Museum, United States of America
  • SubterraneaAleksandrovo Thracian Tomb, Bulgaria
  • ShowcaveAlepotrypa, Greece
  • CaveAlexander Caverns, United States of America
  • SubterraneaAlexander Nevsky Cathedral Underground Crypt, Bulgaria
  • ShowcaveAlexandra Cave, Australia
  • SubterraneaAl Fayah Park, United Arab Emirates
  • MineMuseo dei Minerali Elbani "Alfeo Ricci", Italy
  • SubterraneaAlfina Hotel, Turkey
  • CaveCueva Alfredo Jahn, Venezuela
  • ShowcaveAl Hoota Cave, Oman
  • SubterraneaAliança Underground Museum, Portugal
  • CaveAli Baba’s Cave, Australia
  • CaveAli Barbour’s Cave, Kenya
  • CaveAlikadam Cave, Bangladesh
  • ShowcaveGhar-e-Ali Sadr, Iran
  • ShowcaveSpilaio Alistratis - Alistrati Cave, Greece
  • SubterraneaAljibe Andalusí, Spain
  • MineParque Mineiro De Aljustrel, Portugal
  • ShowcaveAl Kittan, Oman
  • ShowcaveAllander Tropfsteinhöhle, Austria
  • CaveAllikukivi Caves, Estonia
  • MineSinkgruvene i Allmannajuvet, Norway
  • MineParque Minero de Almadén, Spain
  • GorgeCañón de Almadenes, Spain
  • SubterraneaCentro de Interpretación Hábitat Troglodita Almagruz, Spain
  • GorgeAlmbachklamm, Germany
  • CaveCueva de Almendras, Perú
  • MineAlmond Valley Heritage Centre, Great Britain
  • SpringAlmyros Spring, Greece
  • SpringAlmyros Ag. Nikolaou, Greece
  • CaveAl Nahwah Cave, United Arab Emirates
  • KarstAlofaaga Blowholes, Samoa
  • SubterraneaLa Grotte de Glace Alpe d’Huez, France
  • SubterraneaThe Alpha Omega Cave, South Africa
  • ShowcaveJebal Al Qarah, Saudi Arabia
  • ShowcaveAltamira, Spain
  • CaveCueva del Altar, Cuba
  • CavePiatra Altarului, Romania
  • MineSalzbergwerk Altaussee, Austria
  • MineBesucherbergwerk Alte Hoffnung Erbstolln, Germany
  • MineBergbaumuseum Altenberg, Germany
  • ShowcaveAltensteiner Höhle, Germany
  • SubterraneaAlter Elbtunnel, Germany
  • MineAlte Saline, Germany
  • CaveNaturhöhle Altfinstermünz, Austria
  • CaveAltinbesik Mağarası, Turkey
  • SubterraneaAltinocak Restaurant, Turkey
  • CaveCueva de Altxerri, Spain
  • ShowcaveAlufu Dong, China
  • CaveAlum Cave, United States of America
  • KarstAlum Cove Natural Bridge Recreation Area, United States of America
  • CaveAlutila Cave, Bangladesh
  • SubterraneaAluvihare Rock Temple, Sri Lanka
  • SubterraneaAlux Restaurant & Lounge, México
  • ShowcaveGrutas de Alvados, Portugal
  • MineAlvensleben-Stollen, Germany
  • SpringNascentes do Alviela, Portugal
  • CaveAmano Yasugawara, Japan
  • ShowcaveAmarnath Cave, India
  • MineSchaubergwerk Am Aschenberg, Germany
  • ShowcaveAmazing Island Cave, The Philippines
  • CaveMapango ya Amboni - Amboni Caves, Tanzania
  • MineÅmdals Verk Gruver, Norway
  • CaveGrotta Naturale Amenano, Italy
  • SubterraneaAmer Stepwell, India
  • MineVelká Amerika, Czech Republic
  • MineLes Mines d’Améthystes d’Auvergne, France
  • MineStollnsystem »Am Graben«, Germany
  • KarstSumidouro da Ribeira dos Amiais, Portugal
  • SubterraneaAmi Chenin, France
  • SubterraneaAmir Chakhmaq Complex, Iran
  • MineAmlwch Copper Kingdom, Great Britain
  • KarstTuffière d´Amorey, France
  • SubterraneaAmos Rex, Finland
  • MineEisenbahn- und Bergbaumuseum Ampfelwang, Austria
  • ShowcaveAm Phu Cave, Vietnam
  • ShowcaveAnakami shonyudo, Japan
  • SubterraneaAnaktos Santorini Cave Houses, Greece
  • CaveAnanui Cave, New Zealand
  • SpringAnapala Chasm, Niue
  • CaveAnatakitaki, Cook Islands
  • CaveAnatola Cave, Niue
  • SubterraneaAnatolian Houses, Turkey
  • SpringAnavalos Spring, Greece
  • SubterraneaAnchor Church, Great Britain
  • KarstLago di Andalo, Italy
  • CaveCuevas de Andá Mirá, Guatemala
  • SubterraneaAndersgrotta, Norway
  • KarstBuraco das Andorinhas, Brazil
  • CaveAndreas Cave, Greece
  • MineAndreas-Gegentrum-Stolln, Germany
  • MineBanské múzeum štôlňa Andrej, Slovakia
  • CaveAnemone Cave, United States of America
  • ShowcaveSpilaio Anemotrypa, Greece
  • SubterraneaBīr al-Anezīya, Israel
  • SubterraneaThe Angel Microbrewery Cave, Great Britain
  • KarstCenote Angelita, México
  • CaveGrotta dell’Angelo, Italy
  • CaveAnimal Flower Cave, Barbados
  • KarstPozo de las Ánimas, Argentina
  • ShowcaveGrotte d’Anjohibe, Madagascar
  • MineMines de Fer d’Anjou, France
  • KarstRéserve Spéciale Ankarana, Madagascar
  • SubterraneaAnlage Mitte, Poland
  • ShowcaveAnna Barlang, Hungary
  • MineGrube Anna-Elisabeth, Germany
  • GorgeAnniversary Narrows, United States of America
  • SubterraneaChurch of the Annunciation, Israel
  • CaveAnsite, Spain
  • GorgeAntelope Canyon, United States of America
  • SubterraneaAntoniyevi Pechery, Ukraine
  • SubterraneaPavilon Anthropos, Czech Republic
  • SubterraneaCasa Grotta Antica Matera, Italy
  • ShowcaveCuevas de la Antigua Fragua, Spain
  • ShowcaveAntiparos, Greece
  • MineAntonijev Rov, Slovenia
  • MineAntonio Pereira Imperial Topaz Mine, Brazil
  • SubterraneaCueva de Anzo, Spain
  • ShowcaveAoiwa shonyudo, Japan
  • KarstSima Aonda, Venezuela
  • SubterraneaGrenier d’Aoujgal, Morocco
  • CaveApe Cave, United States of America
  • MineApedale Mine, Great Britain
  • CaveCave of the Apocalypse, Greece
  • ShowcaveAppalachian Caverns, United States of America
  • SubterraneaAquarium Grotto, Egypt
  • CaveAquinaldo Cave, The Philippines
  • SubterraneaProjekt Arado, Poland
  • CaveLa Caune de l’Arago, France
  • ShowcaveAranui Cave, New Zealand
  • KarstSentier karstique ASHVS d’Arbecey, France
  • ShowcaveGruta de Arbedales, Spain
  • MineSaline Royale d’Arc-et-Senans, France
  • CaveArch Cave, Canada
  • SubterraneaCave Archangel Michael Panormitis, Greece
  • KarstArchbald Pothole, United States of America
  • CaveArches National Park, United States of America
  • CaveArchilochos Cave, Greece
  • ShowcaveGrotta dell’Arco di Bellegra, Italy
  • CaveEl Arco del Tiempo del Río La Venta, México
  • KarstArco Naturale, Italy
  • MineKaivosyhtiö Arctic Ametisti Oy, Finland
  • ShowcaveGrottes d’Arcy-sur-Cure, France
  • ShowcaveCueva de Ardales, Spain
  • ShowcaveLa Cuevona de Ardines, Spain
  • MineMinas de Arditurri, Spain
  • CaveArdlair Cave, Great Britain
  • MineArdois’alle, Belgium
  • GorgeCueva Arenales, Puerto Rico
  • CaveLa grotta delle Arene Candide, Italy
  • ShowcaveAreni-1 Cave, Armenia
  • SpringFonte Aretusa, Italy
  • GorgeGorges de l’Areuse, Switzerland
  • MineMines de l’Argentière, France
  • SubterraneaCluzeaux d’Argentine, France
  • MineMiniere di Argento Vivo, Italy
  • MineArgo Gold Mill and Museum, United States of America
  • MineArgyle Diamond Mine, Australia
  • SpringArgyroupoli Springs, Greece
  • MineArigna Mining Experience, Ireland
  • SubterraneaArizona Mining and Mineral Museum, United States of America
  • CaveArjeri, Armenia
  • CaveArjun Gufa, India
  • SubterraneaArles Cryptoportiques du Forum, France
  • ShowcaveAven Armand, France
  • CaveArndthöhle, Germany
  • ShowcaveArnhem Cave, Namibia
  • SubterraneaHistorische Kelders Arnhem, Netherlands
  • CaveArnold Ice Cave, United States of America
  • CaveArnsteinhöhle, Germany
  • CaveArochukwu Cave, Nigeria
  • CaveCaverna Aroe Jari, Brazil
  • CaveParque Natural da Arrábida, Portugal
  • CaveArroyo Tapiado Mud Caves, United States of America
  • CaveLa Grotta dell’ Arsenale, Italy
  • ShowcaveCoves de Artá, Spain
  • MineMuseo dell’Arte Mineraria, Italy
  • SubterraneaCave Village Artenara, Spain
  • MineSchaubergwerk Arthurstollen, Austria
  • CaveArtlish River Cave, Canada
  • SubterraneaArt Space Winery, Greece
  • SubterraneaArtwinery, Ukraine
  • SubterraneaAruküla Caves, Estonia
  • ShowcaveArwah Cave, India
  • MineSchau- und Lehrstollen Arzberg, Austria
  • CaveArzberghöhle, Austria
  • MineAsbestos Mineral Museum, Canada
  • Subterranea’Ashabi Alkahf, Jordan
  • CaveAshabi Kahf, Azerbaijan
  • CaveAshab-ı Kehf Mağarası, Turkey
  • MineAshio Copper Mine, Japan
  • GorgeAskola Potholes, Finland
  • ShowcaveAskyn Ice Cave, Russia
  • ShowcaveAso Windhole, Japan
  • CaveBrachoskepi Asprochaliko, Greece
  • CaveGoa Asri, Indonesia
  • MineHistorisches Dachschieferbergwerk Assberg, Germany
  • MineSchachtanlage Asse II, Germany
  • SubterraneaAstana Underground Museum, China
  • MineAstley Green Colliery Museum, Great Britain
  • SubterraneaL’Astore Masseria, Italy
  • SubterraneaAsura Cave, Nepal
  • SubterraneaAtaman Hotel, Turkey
  • ShowcaveAtapuerca, Spain
  • CaveGrutas de Atepolihui, México
  • SubterraneaUnderground Atlanta, United States of America
  • SubterraneaAtlantic Cave, United Arab Emirates
  • CaveAtlantida, Ukraine
  • SubterraneaAtlantikwall, France
  • MineAtlas Coal Mine National Historic Site, Canada
  • SubterraneaAtomic Museum, United States of America
  • SubterraneaKGB Atominis Bunkeris, Lithuania
  • SubterraneaAtomkeller, Germany
  • SubterraneaThe Treasury of Atreus, Greece
  • ShowcaveAttahöhle, Germany
  • KarstPozas Azules de Atzala, México
  • SubterraneaLa Carrière d’Aubigny, France
  • MineMusée de la Mine d’Aubin, France
  • MineMusée de la Mine d’Auchel, France
  • ShowcaveGrotte des Audides, France
  • SubterraneaAuerbachs Keller, Germany
  • KarstAufberger Loch, Germany
  • MineMusée des Mines de Fer d’Aumetz, France
  • SubterraneaAuracher Löchl, Austria
  • SubterraneaAurangabad Caves, India
  • MineAurora Erbstolln, Germany
  • MineMuzeul Aurului din Brad, Romania
  • CaveCueva del Cerro Autana, Venezuela
  • SubterraneaAux Vieux Logis, France
  • CaveAvaiki, Niue
  • GorgeAvakas Gorge Trail, Cyprus
  • MineAvan Mine, Armenia
  • MineÄventyrsgruvan, Sweden
  • CaveCueva de los Aviones, Spain
  • ShowcaveDisco Ayla, Cuba
  • SubterraneaAydıntepe Yeraltı Şehri, Turkey
  • CaveAyia Napa Sea Caves, Cyprus
  • SubterraneaAyias Solomonis Cave Church and Catacombs, Cyprus
  • SubterraneaAyia Thekla Cave Church, Cyprus
  • SubterraneaAyioi Saranta Cave Church, Cyprus
  • SubterraneaAyios Sozomenos Cave Church, Cyprus
  • SubterraneaAynalı Mağara, Turkey
  • ShowcaveAynalıgöl Mağarası, Turkey
  • KarstAyn Athum Waterfall, Oman
  • KarstAyn Jarziz, Oman
  • CaveAyo Rocks, Aruba
  • KarstAyres Natural Bridge, United States of America
  • CaveAyvaini Mağarası, Turkey
  • ShowcaveGrotte d’Azé, France
  • ShowcaveGrotte du Mas-d’Azil, France
  • SubterraneaAzize Thecla Kutsal Alanı, Turkey
  • CaveAzokh Cave, Azerbaijan
  • SpringPozo Azul, Spain
  • KarstCenote Azul, México
  • SpringPoço Azul, Brazil
  • ShowcaveGrotta Azzurra, Italy
  • ShowcaveHöllgrotten Baar, Switzerland
  • CaveBaatara Cave, Lebanon
  • ShowcaveJama pod Babjim zobom, Slovenia
  • ShowcaveGruta do Bacaetava, Brazil
  • MineBachelor-Syracuse Mine Tour, United States of America
  • ShowcaveBacho Kiro, Bulgaria
  • KarstBadab Soort, Iran
  • SubterraneaBadami Cave Temple, India
  • CavePećina Badanj, Bosnia and Herzegovina
  • MineKurzentrum Bad Bleiberg, Austria
  • MineBadger Mine and Museum, United States of America
  • CaveBaekryong Donggul, South Korea
  • ShowcaveBärenhöhle, Germany
  • CaveBärenhöhle Oberammergau, Germany
  • GorgeBärenschützklamm, Austria
  • MineBagdad Mine, United States of America
  • SubterraneaBag End, Middle-Earth
  • CaveBaggehola, Norway
  • SubterraneaBagh Caves, India
  • MineMiniera della Bagnada, Italy
  • SpringBagni San Filippo, Italy
  • CaveBagshawe Cavern, Great Britain
  • CaveBahay Paniki Cave, The Philippines
  • CaveChùa Bái Đính, Vietnam
  • ShowcaveBailong Dong, China
  • ShowcaveBaima Dong, China
  • CaveBái Ma Jiàng Jun Dòng, China
  • ShowcaveBaimo Cave, China
  • ShowcaveBainiao Cave, China
  • CaveBaishiya Karst Cave, China
  • ShowcaveBaiyun Dong Hunan, China
  • ShowcaveBaiyun Dong Jiangsu, China
  • ShowcaveBakhardenskaya Cave, Turkmenistan
  • MineBalaclava Mine, Australia
  • SubterraneaNaval Museum Complex Balaklava, Russia
  • CaveBalangagan Cave, The Philippines
  • MineMiniera di Amianto di Balangero e Corio, Italy
  • ShowcaveGruta de Balankanché, México
  • MineBalás Jenő Bauxitbányászati Múzeum, Hungary
  • ShowcaveBalatini Mağarası, Turkey
  • MineBalatoc Mines Tour, The Philippines
  • ShowcaveJeskyne Balcarka, Czech Republic
  • CaveCueva Balcones, Puerto Rico
  • GorgeBalda Canyon, Georgia
  • MineBald Hill Mine, Australia
  • CaveBalek Sulfur Caves, Papua New Guinea
  • SubterraneaTeqehja Ballëm Sulltani, Albania
  • ShowcaveBallica Magarasi, Turkey
  • CaveThe Ballroom, New Zealand
  • SubterraneaGrottenburg Balm, Switzerland
  • ShowcaveGrottes de la Balme, France
  • CaveBaloc-Baloc Cave, The Philippines
  • CaveBalsbergsgrottan, Sweden
  • ShowcaveBalver Höhle, Germany
  • CaveGrotte di Balzi Rossi, Italy
  • ShowcaveBama Cave, China
  • KarstBamei Polje, China
  • MineBaňa Cígeľ, Slovakia
  • MineBanbury Tourist Mine, New Zealand
  • SubterraneaBandelier, United States of America
  • SubterraneaBandiagara Escarpment, Mali
  • SubterraneaBaneshwar Cave Temple, India
  • KarstBản Giốc Waterfall, Vietnam
  • GorgeBănița Gorge, Romania
  • ShowcaveBanjaran Hotsprings Retreat, Malaysia
  • MineBanská Štiavnica, Slovakia
  • ShowcaveBanwell Bone Caves, Great Britain
  • SpringBaotu Spring, China
  • ShowcaveBaqi Dong, China
  • ShowcaveGrotte de Bara-Bahau, France
  • SubterraneaBarabar Caves, India
  • ShowcaveBaračeve špilje, Croatia
  • ShowcaveBaradla Barlang, Hungary
  • CaveBaranca Sunu Grot, Aruba
  • CaveGoa Barat, Indonesia
  • MineBarbarastollen, Germany
  • MineFörder- und Aussichtsturm Barbaraturm, Germany
  • ShowcaveBarbarossahöhle, Germany
  • ShowcaveJama Baredine, Croatia
  • SubterraneaBari Imam Cave, Pakistan
  • KarstBarracuda Lake, The Philippines
  • GorgeGruta da Barreira, Brazil
  • SubterraneaBarry troglodyte village, France
  • KarstBarsuko Ola, Lithuania
  • MineBartholomäberg, Austria
  • MineBartholomäusschacht, Germany
  • SpringBarton Springs, United States of America
  • CaveBarton Creek Cave, Belize
  • SpringBasakan Spring, The Philippines
  • SubterraneaBasarbovo Cave Monastery, Bulgaria
  • SubterraneaBasiliani Hotel, Italy
  • CaveTunnel du Bassin Bleu, France
  • MineBastnäsfältet, Sweden
  • CaveBat Cave, Cayman Islands
  • SubterraneaBat Cave, Canada
  • CaveBat Cave Mine, United States of America
  • CaveBatadomba Lena, Sri Lanka
  • CaveBatatota Lena, Sri Lanka
  • ShowcaveBat Bar (Lost Canyon Cave), United States of America
  • CaveBates Cave, Australia
  • ShowcaveBathala Caves, The Philippines
  • CaveBat Cave, Montserrat
  • MineBattery Hill, Australia
  • SubterraneaBattistero Neoniano, Italy
  • SubterraneaBattle of Britain Control Room, Great Britain
  • ShowcaveBatu Caves, Malaysia
  • ShowcaveGoa Batu Cermin, Indonesia
  • CaveGua Batu Maloi, Malaysia
  • ShowcaveAgop Batu Tulug, Malaysia
  • SubterraneaDdieri di Baulì, Italy
  • ShowcaveBaumannshöhle, Germany
  • ShowcaveLa Baume Bonne, France
  • CaveGrotte de la Baumelle, France
  • KarstCascade des Baumes, France
  • SubterraneaBava Pyara Caves, India
  • SubterraneaCrypte du Bayaà, France
  • ShowcaveBayin Nyi Cave, Myanmar
  • MineBC Museum of Mining, Canada
  • MineBeaconsfield Mine and Heritage Centre, Australia
  • MineBeamish Museum, Great Britain
  • ShowcaveBear Cave, United States of America
  • SubterraneaGrotta dei Beati Paoli, Italy
  • ShowcaveGrotte di Beatrice Cenci, Italy
  • ShowcaveSt. Beatushöhlen, Switzerland
  • ShowcaveGrotte de Beaume Obscure, France
  • SubterraneaIpogeo de Beaumont Bellacicco, Italy
  • CaveGrotte de Beaussac, France
  • KarstBeaver Falls Karst Trail, United States of America
  • ShowcaveBebravska Pećina, Bosnia and Herzegovina
  • SubterraneaTunnel von Bech, Luxembourg
  • SubterraneaBeckham Creek Cave Haven, United States of America
  • MineBeckley Exhibition Coal Mine, United States of America
  • CaveGrotte du Bédat, France
  • ShowcaveGrotte de Bédeilhac, France
  • SubterraneaBedsa Caves, India
  • SubterraneaBeer Quarry Caves, Great Britain
  • CaveGrottene i Beiarn, Norway
  • SubterraneaBeihai Tunnel, China
  • SubterraneaBeishiku Si, China
  • SubterraneaBeit She’arim National Park, Israel
  • CaveBéke-barlang, Hungary
  • CaveBekiris Cave, Greece
  • MinePola Bełchatów, Poland
  • ShowcaveCueva de Belda, Spain
  • CaveBeldibi Magarasi, Turkey
  • SubterraneaBelgrade Underground Tour, Serbia
  • SubterraneaPasaje Belgrano, Argentina
  • ShowcaveBelianska Jaskyna, Slovakia
  • KarstPećina Beli izvorac, Serbia
  • CaveBelilena Cave, Sri Lanka
  • SubterraneaBell Caves, Israel
  • ShowcaveCuevas de Bellamar, Cuba
  • GorgeOrrido di Bellano, Italy
  • ShowcaveGrotte de Bellevue, France
  • MineBellevue Underground Mine Tour, Canada
  • MineBellingham Heritage Centre, Great Britain
  • SubterraneaBell Inn Caves, Great Britain
  • MineBell Island’s Mine Museum and Underground Tour, Canada
  • ShowcaveBellony Cave, Haiti
  • ShowcaveBell Witch Cave, United States of America
  • ShowcaveCueva de Belmaco, Spain
  • GorgeBelogradchik Rocks, Bulgaria
  • ShowcaveBelum Caves, India
  • ShowcaveGrotte di Belverde, Italy
  • KarstTsingy de Bemaraha, Madagascar
  • CaveBen’s Cave, Bahamas
  • CaveAlgar de Benagil, Portugal
  • MineGrube Bendisberg, Germany
  • SubterraneaTomb of Benei Hezir, Israel
  • ShowcaveGrotte des ain Beni Add, Algeria
  • ShowcaveCuevas de Benifallet, Spain
  • CaveBagno Asciutto Grotta Di Benikulá, Italy
  • CaveLa Cueva de Ben Loman, Belize
  • MineBenshan Fifth Tunnel, China
  • SubterraneaBenshoof Cistern Museum, Israel
  • SubterraneaBenten Cave, Japan
  • ShowcaveBenxi Water Cave, China
  • ShowcaveGouffre du Béout, France
  • SpringBeppu Benten Pond, Japan
  • KarstBerberov Buk, Croatia
  • KarstHoher Brunnen Berching, Germany
  • MineSalzbergwerk Berchtesgaden, Germany
  • MineHeilstollen Berchtesgaden, Germany
  • CaveGrotta Marina di Bergeggi, Italy
  • MineBergmagazin Marienberg, Germany
  • MineMijnmuseum Beringen, Belgium
  • SubterraneaBeringer Vineyards, United States of America
  • MineBerkeley Pit, United States of America
  • SubterraneaBerliner Unterwelten, Germany
  • CaveCueva de Berna, Dominican Republic
  • SubterraneaCaves Bernard-Massard, Luxembourg
  • ShowcaveGrottes de Bernifal, France
  • MineBernsteiner Felsenmuseum, Austria
  • SpringBerry Springs, Australia
  • MineBersham Colliery, Great Britain
  • MineBertrix Slate Mine, Belgium
  • MineBesucherbergwerk Bertsch, Germany
  • KarstBešeňovské travertíny, Slovakia
  • SubterraneaBeşikli Kaya Mezarları, Turkey
  • SubterraneaB-Werk Besseringen, Germany
  • CaveBeston Cave, Iraq
  • ShowcaveGrottes de Bétharram, France
  • ShowcaveBethlehem Cave, United States of America
  • SubterraneaEiskeller der Brauerei Beuing, Germany
  • MineBeulah Mine, United States of America
  • KarstSentier karstique de Beurey-sur-Saulx, France
  • ShowcaveGua Bewah, Malaysia
  • MineSaarländisches Bergbaumuseum Bexbach, Germany
  • SubterraneaParc archéologique de Beynac, France
  • ShowcaveLes Grottes de Bèze, France
  • SubterraneaBezeklik Thousand Buddha Caves, China
  • SubterraneaBhaja Caves, India
  • SubterraneaBhalil Cave Dwellings, Morocco
  • SubterraneaBhandara Buddhist Caves, India
  • SubterraneaBhartrihari Caves, India
  • CaveBhimbetka, India
  • KarstBhimkund, India
  • MineDr. Bhol Klipbua Mine Tunnel, Thailand
  • ShowcavePatal Bhuvaneshvar, India
  • ShowcaveBicchu-Kanachi ana, Japan
  • CaveChùa Bích Động, Vietnam
  • KarstVodopad Bigar, Serbia
  • KarstBig Basin, United States of America
  • CaveBig Bone Cave, United States of America
  • MineBig Brutus, Inc., United States of America
  • CaveBig Four Ice Caves, United States of America
  • CaveBig Ice Cave, United States of America
  • MineBig Nugget Mine, United States of America
  • MineBig Opal Mine, Australia
  • MineBig Pit, Great Britain
  • CaveBig Salt Cave, Iran
  • SpringBig Spring, United States of America
  • KarstBig Spring, Anguilla
  • MineBig Thunder Gold Mine, United States of America
  • ShowcavePecina Bijambare - Bijambare Cave, Bosnia and Herzegovina
  • SpringIzvor rijeke Bijele, Croatia
  • MineMina do Bijoca, Brazil
  • ShowcaveBilsteinhöhlen, Germany
  • KarstBilzingsleben, Germany
  • KarstBimmah Sinkhole, Oman
  • SubterraneaBinbirdirek Sarnıçı, Turkey
  • MineBesucherbergwerk Grube Bindweide, Germany
  • ShowcaveBinghöhle, Germany
  • CaveBingag Cave, The Philippines
  • SubterraneaBinġemma, Malta
  • MineBingham Canyon Mine, United States of America
  • ShowcaveBing Hu Dong, China
  • KarstMoleta de Binifaldó, Spain
  • CaveBintakan Cave, The Philippines
  • SubterraneaBird’s Botanicals, United States of America
  • MineBirkhill Caverns Clay Mine, Great Britain
  • CaveTigris Tunnel, Turkey
  • SubterraneaBirresborner Eishöhlen, Germany
  • ShowcavePeštera "Biserna" - Pearl Cave, Bulgaria
  • ShowcaveŠpilja Biserujka, Croatia
  • MineAncienne Mine d’Or et d’Antimoine, France
  • SpringIzviri v Bistri, Slovenia
  • SubterraneaCitadelle de Bitche, France
  • MineBixby Ice Cave, United States of America
  • ShowcaveBiyundong, China
  • CaveBjärs Grottor, Sweden
  • CaveBjörnstugugrottan, Sweden
  • MineGruvmuseet Bjuv, Sweden
  • MineBlaafarveværket, Norway
  • MineBlaauwbank Historic Gold Mine, South Africa
  • ShowcaveBlack Buddha Cave, China
  • ShowcaveBlack Chasm, United States of America
  • ShowcaveBlack-Coffey Caverns, United States of America
  • MineBlack Country Living Museum, Great Britain
  • CaveBlackfellows Hand Cave, Australia
  • ShowcaveBlack Hills Caverns, United States of America
  • MineBlack Hills Mining Museum, United States of America
  • KarstBlack Hole, Bahamas
  • CaveThe Legendary Black Water Rafting, New Zealand
  • SubterraneaManastira Blagoveštenje, Serbia
  • MineBlair Athol Coal Mine, Australia
  • SubterraneaBlair Street Underground Vaults, Great Britain
  • ShowcaveBlanchard Springs Caverns, United States of America
  • ShowcaveBlanche Cave, Australia
  • SubterraneaJeskyně Blanických rytířů, Czech Republic
  • ShowcaveGrotte de Blanot, France
  • MineMusée de la Mine de Blanzy, France
  • SpringBlaue Quelle, Austria
  • KarstBlauer See, Germany
  • SpringBlautopf, Germany
  • CaveCova Blava, Spain
  • GorgeBłędne Skały, Poland
  • MineBlegny, Belgium
  • MineGrube Neue Hoffnung Bleialf, Germany
  • GorgeBletterbachschlucht, Italy
  • CaveTunnel de lave Bleu, France
  • MineLa Mine Bleue, France
  • SpringSource Bleue, France
  • SpringSource Bleue Montperreux, France
  • MineHeritage Blinman Mine, Australia
  • CaveBloomington Cave, United States of America
  • CaveIl-Hnejja, Malta
  • KarstBlue Hole, Egypt
  • CaveBlue Creek Cave, Belize
  • CaveBlue Eye, Cabo Verde
  • KarstBlue Grotto Dive Resort, United States of America
  • MineBlue Hills Tin Streamers, Great Britain
  • KarstGreat Blue Hole, Belize
  • SpringBlue Hole Spring, United States of America
  • SpringBlue Hole, Jamaica
  • SpringBlue Hole Mineral Spring, Jamaica
  • KarstBlue Hole, Bermuda
  • ShowcaveBlue John Cavern, Great Britain
  • SpringBlue Lagoon, Jamaica
  • CaveBlue Lake Rhino Cave, United States of America
  • CaveBlue Room Cave, Curaçao
  • ShowcaveBluespring Caverns, United States of America
  • SpringBlue Spring, United States of America
  • ShowcaveBluff Dweller’s Cave and Browning Museum, United States of America
  • GorgeBlyde River Canyon, South Africa
  • MineBoard Camp Crystal Mine, United States of America
  • SubterraneaGruta da Boa Sorte, Brazil
  • CaveToca da Boa Vista, Brazil
  • MineBobby Dazzler Walk-in Mine, Australia
  • KarstBobijaško oko, Bosnia and Herzegovina
  • MineMuzeum Przemysłu Naftowego i Gazowniczego im. Ignacego Łukasiewicza, Poland
  • SubterraneaCovetes dels Moros, Spain
  • CaveBoca Tabla Cave, Curaçao
  • MineCarrière de Bocheresse, Switzerland
  • MineKopalnia Soli w Bochni, Poland
  • SubterraneaLes casemates du Bock, Luxembourg
  • CaveBocksteinschmiede, Germany
  • CaveBodagrottorna, Sweden
  • MineBodås gruva, Sweden
  • SpringBodenloses Loch, Germany
  • MineSilberberg Bodenmais, Germany
  • CaveBoggle Hole, Great Britain
  • CavePesterna Crkva Sveta Bogorodica, North Macedonia
  • ShowcaveBogovinska pećina, Serbia
  • SpringBoiling Hole, Belize
  • SubterraneaPetit Ouvrage du Bois de Bousse A24, France
  • MineEcomusée du Bois-du-Luc, Belgium
  • MineMineralogické a Banícke Múzeum Bojnice, Slovakia
  • ShowcaveBojnická Jeskyne, Slovakia
  • SpringBoka, Slovenia
  • MineBergrum Boliden, Sweden
  • ShowcavePeștera Bolii, Romania
  • SubterraneaBollinger, France
  • ShowcaveBol’shaya Azishskaya Cave, Russia
  • CaveCova de Bolumini, Spain
  • CaveCueva de B’omb’il Pek, Guatemala
  • ShowcaveBom Jesus da Lapa, Brazil
  • MineBon Accord Mine Complex, Australia
  • CaveBo Nau Cave, Vietnam
  • MineBondstollen Kopparberg, Sweden
  • ShowcaveBone Cave, Great Britain
  • CaveBoninska Peshtera, Bulgaria
  • CaveCueva Bonita, Spain
  • ShowcaveBonnechere Caves, Canada
  • MineBonne Terre Mine, United States of America
  • MineLes Carrières du Bon Temps, France
  • CaveBoone’s Cave State Park, United States of America
  • CaveCavernas El Boquerón, Honduras
  • MineMuzej Rudarstva i Metalurgije Bor, Serbia
  • CaveBorder Cave, South Africa
  • CaveBorenore Caves, Australia
  • ShowcaveGrotte Di Borgio Verezzi, Italy
  • SubterraneaIl Borgo Ritrovato, Italy
  • ShowcaveTham Borichinda, Thailand
  • MineHessisches Braunkohle Bergbaumuseum Borken, Germany
  • ShowcaveBorra Caves, India
  • MineBoryeong Coal Museum, South Korea
  • SubterraneaPętla Boryszyńska, Poland
  • ShowcaveGrotte du Bosc, France
  • SubterraneaBosc de Fades Bar, Spain
  • MineMusée de la Mine de Bosmoreau, France
  • SpringVrelo Bosne, Bosnia and Herzegovina
  • ShowcaveGrotta di Bossea, Italy
  • MineBotallack Mine, Great Britain
  • SubterraneaBottini, Italy
  • KarstBottomless Lakes, United States of America
  • ShowcaveGruta de Botuverá, Brazil
  • CaveBoulder Caves, United States of America
  • CaveBoulder Cave, United States of America
  • CaveGhar Boumâaza, Algeria
  • SubterraneaBounce Below, Great Britain
  • MineMines de Fer de Bourbach-le-Bas, France
  • CaveGrotte de Bournillon, France
  • SubterraneaLes Caves Bouvet-Ladubay, France
  • SubterraneaLes Boves, France
  • CaveBox Canyon Cave, New Zealand
  • ShowcaveTham Bo Ya, Thailand
  • CaveBoyd Cave, United States of America
  • ShowcaveBoyden Cavern, United States of America
  • ShowcaveBoyue Cave, China
  • ShowcaveBozkovske Dolomitove jeskyne, Czech Republic
  • ShowcaveBracken Bat Cave, United States of America
  • ShowcaveAbime de Bramabiau, France
  • CaveGrotte de Brando, France
  • SubterraneaParcours troglodytique de l’Abbaye de Brantôme, France
  • MineMusée de la Mine Brassac les Mines, France
  • KarstLaguna Brava, Guatemala
  • SubterraneaAmphitheater Breechkaul, Luxembourg
  • GorgeBreitachklamm, Germany
  • CaveGruta dos Brejões, Brazil
  • SpringBrenztopf, Germany
  • ShowcaveBrestovská jasky?a, Slovakia
  • MineDalen-Kjørholt Gruve, Norway
  • SubterraneaChâteau de Brézé, France
  • MineHornické Muzeum, Czech Republic
  • ShowcaveBridal Cave and Thunder Mountain Park, United States of America
  • KarstBrides Cave, Australia
  • CaveBridge of God, Bulgaria
  • KarstBrierfield Turlough, Ireland
  • CaveGrotta dei Briganti, Italy
  • SubterraneaBrighton’s Victorian Sewer, Great Britain
  • SubterraneaMorski Tunel Brijesta, Croatia
  • CaveBrillenhöhle, Germany
  • KarstBrimble Pit and Cross Swallet Basins, Great Britain
  • SubterraneaAqueduc Souterrain de Briord, France
  • ShowcaveBristol Caverns, United States of America
  • SubterraneaBrněnská kostnice, Czech Republic
  • MineBroken Boot Gold Mine, United States of America
  • MineSchaustollen Silberbergwerk Bromriesen, Austria
  • SubterraneaBronson Caverns, United States of America
  • MineBrooks Drift Mine, United States of America
  • SubterraneaBrotherhood Winery, United States of America
  • CaveBrotschgrotte, France
  • GorgeBroumovské stěny, Czech Republic
  • MineMusée de la mine de Bruay, France
  • CaveBruce’s Cave, Ireland
  • SubterraneaBruce’s Cave, Great Britain
  • CaveBruce Peninsula Grotto, Canada
  • CaveBruce’s Caves, Canada
  • CaveWiarton’s Hermit, Canada
  • CaveBruedertöbeli, Switzerland
  • SubterraneaBrünig Indoor Schiess-Sport-Zentrum, Switzerland
  • ShowcaveCaverna de las Brujas, Argentina
  • ShowcaveLas Cuevas de las Brujas, Spain
  • SubterraneaBrûly-de-Pesche 1940, Belgium
  • CaveBruneckerhöhle, Austria
  • SubterraneaCampement préhistorique de Bruniquel, France
  • MineBrunner Mine, New Zealand
  • CaveBrunnsteinhöhle, Germany
  • SubterraneaBrunson Instrument Company, United States of America
  • MineMines de Bruoux, France
  • MineMaison de la Mine d’Argent de Jacques Cœur Brussieu, France
  • MineMiniera d’Oro di Brusson, Italy
  • MineMusée des Mines de la Brutz, France
  • GorgeBryce Canyon, United States of America
  • SubterraneaBunker B-S 8 Hřbitov, Slovakia
  • KarstBua Tong, Thailand
  • CaveBuchenlochhöhle, Germany
  • SubterraneaHöhlenburg Buchfart, Germany
  • MineQuarzsandbergwerk im Krähstel, Switzerland
  • SubterraneaBuco di Viso, Italy
  • SubterraneaBudai Váralagút, Hungary
  • SubterraneaBude Tunnel, Great Britain
  • MineSchaubergwerk Büchenberg, Germany
  • ShowcaveGrotta di Bue Marino, Italy
  • CaveBuenavista Cave, The Philippines
  • CaveBuffalo National River, United States of America
  • ShowcaveBuffalo Cave, Vietnam
  • SubterraneaBuffalo Bayou Park Cistern, United States of America
  • CaveBugasan Cave, The Philippines
  • MineKalimuseum Buggingen, Germany
  • CaveBu Haban Cave, Oman
  • ShowcaveBukilat Cave, The Philippines
  • CaveBukovica, Bosnia and Herzegovina
  • SubterraneaBulla Regia, Tunisia
  • CaveBullers of Buchan, Great Britain
  • KarstBullock Creek Sinks, New Zealand
  • ShowcaveBull Shoals Caverns, United States of America
  • MineBultfontein Mine, South Africa
  • ShowcaveBulwang Caves, The Philippines
  • SpringIzvor Buna, Bosnia and Herzegovina
  • SubterraneaBundesbank-Bunker, Germany
  • SubterraneaAtombunker der Bundesregierung, Germany
  • SubterraneaBunk´Art 1, Albania
  • SubterraneaBunk´Art 2, Albania
  • SubterraneaBunker Mooseum, Italy
  • SubterraneaWestwallmuseum Bunker 20, Germany
  • SubterraneaBunkermuseum Emden, Germany
  • SubterraneaBunkermuseum Hamburg, Germany
  • SubterraneaBunkermuseum Rennsteig, Germany
  • SubterraneaGrotta del Buontalenti, Italy
  • KarstBuraco das Araras, Brazil
  • KarstBuraco das Araras, Brazil
  • CaveFurna do Buraco do Padre, Brazil
  • MineBesucherbergwerk Burgbergstollen, Germany
  • KarstTravertine of Burgtonna, Germany
  • MineMinas de Burguillos del Cerro, Spain
  • GorgeBurke’s Luck Potholes, South Africa
  • GorgeBurkhardklamm, Italy
  • SubterraneaBurlington, Great Britain
  • MineBurra Monster Mine, Australia
  • CaveBurrows’ Cave, United States of America
  • ShowcaveBushmans Kloof, South Africa
  • ShowcaveThe Caves of the Bussento River, Italy
  • GorgeGouffres des Busseraille, Italy
  • ShowcaveGrutas de Bustamante, México
  • ShowcaveHang Bụt, Vietnam
  • SubterraneaCovolo di Butistone, Italy
  • ShowcaveButterfly Cave, China
  • MineMusée La Mémoire du Sel Buttes, Switzerland
  • ShowcaveCueva de El Buxu, Spain
  • GorgeBuynovsko Zhdrelo, Bulgaria
  • CaveBuz Mağarası, Turkey
  • ShowcaveBuzluk Mağarası, Turkey
  • MineOld Bwana Mukubwa Tourism Centre, Zambia
  • ShowcaveByakuren-do, Japan
  • CaveJeskyně Býčí skála, Czech Republic
  • CaveByron Glacier Ice Caves, United States of America
  • ShowcaveBystrianska Jaskyna, Slovakia
  • CaveCuevas las Cabachuelas, Puerto Rico
  • ShowcaveCabaret Cave, Australia
  • ShowcaveCuevas de Cabarete, Dominican Republic
  • MineMiniera di Zolfo Cabernardi, Italy
  • SubterraneaCabinet War Rooms, Great Britain
  • CaveNucleo Caboclos, Brazil
  • ShowcaveGouffre Géant de Cabrespine, France
  • ShowcaveGrutas de Cacahuamilpa, México
  • MineSalina Cacica, Romania
  • CaveCacupangan Cave, The Philippines
  • MineMuseu Mina Modelo Caetano Sonego, Brazil
  • SubterraneaCafé in the Crypt, Great Britain
  • GorgeGrotte del Caglieron, Italy
  • MineMusée-Mine Départemental, France
  • SubterraneaManoir de la Caillère, France
  • ShowcaveGrotta della Cala, Italy
  • CaveCala Covas, Spain
  • CaveGrotte di Cala Luna, Italy
  • CaveCova Cala Varques, Spain
  • KarstCenote Calavera, México
  • ShowcaveCueva de las Calaveras, Spain
  • CaveCalbiga Caves, The Philippines
  • SubterraneaCalcata Cave Houses, Italy
  • ShowcaveCalcehtok Cave, México
  • MineMiniera di Calceranica, Italy
  • SubterraneaCaldecotte Project, Great Britain
  • MineCaledonia Copper Mine, United States of America
  • SubterraneaGrottes de Calès, France
  • CaveCaleta Negra, Spain
  • ShowcaveCalgardup Cave, Australia
  • ShowcaveCalifornia Caverns, United States of America
  • ShowcaveÇalköy Mağarası, Turkey
  • CaveCueva de Callacpuma, Perú
  • ShowcaveCallao Cave, The Philippines
  • KarstCircuit de la Vallée Sèche de Calmoutier, France
  • SubterraneaEremo di Calomini, Italy
  • CaveGħar Calypso, Malta
  • SubterraneaCittà sotterranea di Camerano, Italy
  • ShowcaveCameron Cave, United States of America
  • CaveGrotta del Cammello, Italy
  • ShowcaveCammoo Cave, Australia
  • CaveCamooweal Caves National Park, Australia
  • ShowcaveCuevas de Campanet, Spain
  • KarstCovolo di Camposilvano, Italy
  • SubterraneaMuseo Termas Romanas de Campo Valdés, Spain
  • KarstLagunas de Cañada del Hoyo, Spain
  • ShowcaveCuevas del Canelobre, Spain
  • SubterraneaCanard Duchene, France
  • CaveCanashito Grot, Aruba
  • ShowcaveCandelaria Caves, Guatemala
  • KarstCenotes de Candelaria, Guatemala
  • MineMina Candelaria, Chile
  • SubterraneaGrotta del Cane, Italy
  • ShowcaveCango Caves, South Africa
  • CaveGruta de las Canicas, México
  • MineÇankırı Tuz Mağarası, Turkey
  • ShowcaveCova de Can Marçà, Spain
  • SubterraneaOriu di i Canni, France
  • SubterraneaLos Caños del Peral, Spain
  • CaveCoves de Can Riera, Spain
  • CaveCantabon Cave, The Philippines
  • MineMuseo del Cantero, Spain
  • CaveCanyon Creek Ice Cave, Canada
  • ShowcaveBuraco do Cão, Brazil
  • MineCapão Mine, Brazil
  • ShowcaveAbri Préhistorique du Cap Blanc, France
  • MineCape Breton Miners’ Museum, Canada
  • MineCapelton Mines, Canada
  • MineMusée de la Mine de Cap Garonne, France
  • CaveCapigtan Cave, The Philippines
  • CaveCapisaan Cave, The Philippines
  • MineCapital Prize Gold Mine Tours, United States of America
  • SubterraneaMuseo del Capitolo di San Lorenzo, Italy
  • MineMuseo delle Miniere di Capoliveri, Italy
  • SubterraneaCappadocia Cave Suites, Turkey
  • SubterraneaCappadocia Palace, Turkey
  • SubterraneaCappadocia Cave Resort & Spa, Turkey
  • SubterraneaCatacombe dei Cappuccini, Italy
  • SubterraneaChiesa del Cappuccino Vecchio, Italy
  • SubterraneaEl Búnker del Capricho, Spain
  • SubterraneaLa Cueva Caprichosa, Spain
  • ShowcaveCapricorn Caves, Australia
  • SpringPoza de Fuente Caputa, Spain
  • GorgeGorges de Carança, France
  • MineCarbonate Mine, United States of America
  • ShowcaveGrotte des Carbonnières, France
  • CaveGrotta di Carburangeli, Italy
  • MineMuntanya de Sal a Cordona, Spain
  • ShowcaveCarey’s Cave, Australia
  • SubterraneaAntiche Grotte del Caricatore, Italy
  • CaveGruta de Carlos Pacheco, México
  • CaveCarlotta Arch, Australia
  • ShowcaveCarlsbad Caverns, United States of America
  • KarstCarmel National Nature Reserve, Great Britain
  • MineCarnglaze Slate Caverns, Great Britain
  • MineCarolinen Grube, Germany
  • ShowcaveGrottes de Carpe Diem, France
  • SubterraneaEstación de Carpetana, Spain
  • KarstCarran Turlough, Ireland
  • MineCarreau Rodolphe, France
  • MineMusée du Carreau Wendel, France
  • CaveCarreg Cennen Castle Caves, Great Britain
  • SubterraneaCarrières des Capucins, France
  • CaveBat Cave, United States of America
  • ShowcaveCascade Cavern, United States of America
  • ShowcaveSaltpetre Cave, United States of America
  • ShowcaveX Cave, United States of America
  • CaveCartwright’s Cave, Bahamas
  • CaveCartwright Duho Cave, Bahamas
  • MineMuseu Estadual do Carvão, Brazil
  • ShowcaveGruta do Carvão, Portugal
  • ShowcaveAlgar do Carvão, Portugal
  • CaveCarver’s Cave, United States of America
  • SubterraneaCasa Cava, Italy
  • SubterraneaCasa Cisterna Sotterranea, Italy
  • SubterraneaLa Casa di Lucio, Italy
  • SubterraneaStorica Casa Grotta di Vico Solitario, Italy
  • SubterraneaCasa Grotta del Casalnuovo, Italy
  • CaveHang Cá Sấu, Vietnam
  • ShowcaveCascade Caverns, United States of America
  • KarstCascade des Tufs, France
  • CaveParque da Cascata, Brazil
  • CaveCasibari Rocks, Aruba
  • SubterraneaCasino Keller, Austria
  • ShowcaveCueva de Castañar, Spain
  • SubterraneaSouterrain médiéval du Castela, France
  • ShowcaveGrotta di Castelcivita, Italy
  • SubterraneaGrotte di Sant’Anna Castelfidardo, Italy
  • ShowcaveGrotta di Castellana, Italy
  • CaveSantuario del Pla de Petracos, Spain
  • SubterraneaCastello Sicano, Italy
  • CaveGrotta di Castello Tesino, Italy
  • ShowcaveCastle Cave, Australia
  • MineCastle Dome Mine Museum, United States of America
  • KarstCastleplunkett Turlough, Ireland
  • SubterraneaCatacombe Roma - The Catacombs of Rome, Italy
  • SubterraneaThe Catacombs of Paris, France
  • GorgeÇatak Kanyonu Cam Terası, Turkey
  • CaveCueva Cataratas de Hueque, Venezuela
  • CaveCataviña, México
  • ShowcaveGrutas de la Catedral, México
  • MineBesucherbergwerk Grube Catharina Neufang, Germany
  • ShowcaveCathedral Cave, United States of America
  • CaveCathedral Caves, New Zealand
  • ShowcaveCathedral Cave, Great Britain
  • ShowcaveCathedral Cave, Bermuda
  • ShowcaveCathedral Cave, Australia
  • GorgeCathedral Gorge, Australia
  • CaveThe Cathedral, Bahamas
  • GorgeCathedral Gorge, United States of America
  • ShowcaveCathedral Caverns, United States of America
  • SubterraneaCathedrale d’Images, France
  • SubterraneaLes Cathédrales de la Saulaie, France
  • CaveCat Hole Cave, Great Britain
  • ShowcaveGrotta del Caudano, Italy
  • CaveGiant’s Causeway, Ireland
  • MineCava 177, Italy
  • SubterraneaMuseo Cava Acque, Italy
  • SubterraneaParco archeologico di Cava d´Ispica, Italy
  • SubterraneaCavallo d´Ispica, Italy
  • ShowcaveGrotta del Cavallone, Italy
  • CaveFurnas do Cavalum, Portugal
  • KarstCavan Burren Park, Ireland
  • CaveCavannagh Cave, Anguilla
  • CaveCave-in-Rock State Park, United States of America
  • SubterraneaCavea Arcari, Italy
  • ShowcaveCave and Basin, Canada
  • KarstCave Creek, New Zealand
  • MineCave Creek Museum, United States of America
  • SubterraneaCave Escape Nottingham, Great Britain
  • KarstCave Garden, Australia
  • SubterraneaCave Hill, Ireland
  • SubterraneaCaveman Bar-BQ & Steak House, United States of America
  • SubterraneaCave Museum Santorini, Greece
  • ShowcaveCave of the Winds, United States of America
  • ShowcaveCave of the Winds, United States of America
  • SubterraneaCaveoso Hotel, Italy
  • SubterraneaCave des Producteurs de Montlouis, France
  • CaveCave River Park, United States of America
  • SubterraneaCavern Club, Great Britain
  • CaveCaverna 54, Paraguay
  • CaveCavern Lake Cave, United States of America
  • SubterraneaCave Santorini Spa, Greece
  • CaveCaves Branch Jungle Lodge, Belize
  • SpringCave Spring, United States of America
  • CaveCave Spring Historic Site & Nature Center, United States of America
  • ShowcaveCave Spring Caverns, United States of America
  • CaveCave Spring, United States of America
  • SpringCave Spring Hollow, United States of America
  • CaveCave Stream, New Zealand
  • ShowcaveCave Vineyard, United States of America
  • MineMuseo della Miniera e del Territorio Cavriglia, Italy
  • CaveÇayır Mağarası, Turkey
  • ShowcaveCayman Crystal Caves, Cayman Islands
  • SubterraneaRoc de Cazelle, France
  • MineBois du Cazier, Belgium
  • SpringCedar Creek Springs, United States of America
  • MineCefn Coed Colliery Museum, Great Britain
  • SubterraneaCehennemağzi Mağarası, Turkey
  • CaveGrotte Célestine, France
  • ShowcaveCennet Adası Mağarası, Turkey
  • ShowcaveCennet ve Cehennem, Turkey
  • CaveCenobio de Valerón, Spain
  • MineMine d’Argent Romaine de Cénomes, France
  • KarstCenotillo, México
  • CaveCentaur’s Cave, Antigua & Barbuda
  • CaveCave of Centaur Chiron, Greece
  • CaveGruta do Centenário, Brazil
  • MineCenter Mine, United States of America
  • KarstCento Pozzi, Italy
  • MineCentralia Burning Coal Mine, United States of America
  • ShowcaveCerberus Cave, Australia
  • MineMuseu de les Mines de Cercs, Spain
  • ShowcaveGrotte du Cerdon, France
  • ShowcaveCeremošnja Pecina, Serbia
  • CaveGua Cerita, Malaysia
  • KarstCerknisko Jezero, Slovenia
  • CaveCerme Cave, Indonesia
  • Showcave Cerovačke špilje, Croatia
  • CaveCerro Azul, Colombia
  • CaveCavernas del Viejo Volcan Parque Cerro Leones, Argentina
  • MineGrafitový důl Český Krumlov, Czech Republic
  • CavePestera Cetatile Ponorului, Romania
  • SpringIzvor rijeke Cetine, Croatia
  • CaveCetinjska Pećina, Montenegro
  • KarstCenote Chac Mool, México
  • CaveChainospilios, Greece
  • CaveGrotte de la Chaise, France
  • ShowcaveChal-Nakhjir, Iran
  • CaveHang Cha Loi, Vietnam
  • SubterraneaEstación de Chamberí, Spain
  • MineChambers of the Black Hand, Australia
  • ShowcaveChamera Guffa, Nepal
  • SubterraneaMusée Suisse de la Spéléologie, Switzerland
  • MineMusée de la mine de Champagnac, France
  • SubterraneaFort d’artillerie de Champex-Lac, Switzerland
  • SubterraneaLe Musée du Champignon, France
  • MineChañarcillo Mine, Chile
  • SubterraneaChand Baori, India
  • ShowcaveChangshou Shuijinggong, China
  • SubterraneaChangyu Dongtian - Changyu Stone Cave, China
  • SubterraneaThe Channel Island Military Museum, Great Britain
  • SubterraneaChannel Tunnel, Great Britain
  • ShowcaveChaoyang Dong, China
  • CaveChaoyang Thousand Buddha Caves Scenic Area, China
  • SubterraneaEl Chapandáz, Spain
  • CaveChapel Cave, United States of America
  • ShowcaveGua Charah, Malaysia
  • CaveCueva Charles Brewer, Venezuela
  • ShowcaveCharlottenhöhle, Germany
  • KarstThe Chasm, New Zealand
  • SubterraneaUnderground Chattanooga, United States of America
  • MineChatterley Whitfield Mining Museum, Great Britain
  • CaveGrotte des Chauves-souris, Tunisia
  • SubterraneaGrotte Chauvet 2 Ardèche, France
  • CaveGrotte Chauvet, France
  • CaveChe Chem Hah, Belize
  • ShowcaveCheddar Caves & Gorge, Great Britain
  • GorgeCheddar Gorge, Great Britain
  • MineChelmskie Podziemia Kredowe, Poland
  • SubterraneaChelter-Koba, Russia
  • GorgeChemin de la Mâture, France
  • KarstCenote Chemuyil, México
  • ShowcaveCheondong Cave, South Korea
  • ShowcaveCheongok Golden Bat Cave, South Korea
  • MineCheoram Coal Mine History Village, South Korea
  • SubterraneaMuseum of Speleology and Bulgarian Karst, Bulgaria
  • SubterraneaOriu de Chera, France
  • ShowcaveHistoric Cherokee Caverns, United States of America
  • CaveCherokee Cave, United States of America
  • SubterraneaChersonesos Cave Chruch, Russia
  • CaveChessiloch, Switzerland
  • ShowcaveTham Chet Khot, Thailand
  • CaveCheung Po Tsai Cave, China
  • ShowcaveTham Chiang Dao, Thailand
  • MineChicago Museum of Science and Industry, United States of America
  • CaveCueva del Indio de Chichiriviche, Venezuela
  • CaveCueva de Chicho, Dominican Republic
  • MineMinas Chico Rei, Brazil
  • ShowcaveLa Caverna de Chicoy, Guatemala
  • ShowcaveChi Day Caves, Vietnam
  • ShowcaveGrotte du Chien, France
  • CaveHang Chiều, Vietnam
  • ShowcaveChifley Cave, Australia
  • MineMuseo Mina Chiflón del Diablo, Chile
  • KarstCenote Chihuo-Hol, México
  • CaveChikura Cavern, Japan
  • CaveChilibrillo Cave, Panama
  • ShowcaveChillagoe Caves, Australia
  • ShowcaveChinhoyi Cave, Zimbabwe
  • CaveChiquibul Cave System, Belize
  • SubterraneaChislehurst Caves, Great Britain
  • SubterraneaGrotta di Chitaridd, Italy
  • SubterraneaMuseo civico "La Città Sotterranea", Italy
  • GorgeCholerenschlucht, Switzerland
  • GorgeCholerenschlucht, Switzerland
  • MineChollar Mine, United States of America
  • SubterraneaCholula - Quetzalcoatl Tunnels, México
  • ShowcaveTham Chom Ong, Laos
  • CaveRìo Subterráneo Chontalcoatlán, México
  • ShowcaveTham Chorakhe, Thailand
  • ShowcaveGrottes de Choranche, France
  • SubterraneaChrám kamene, Czech Republic
  • SubterraneaChreli Abano, Georgia
  • CaveChristian Cave, Japan
  • MineBesucherbergwerk Grube Christiane, Germany
  • SubterraneaChristiansborg Slot, Denmark
  • MineSchieferbergwerk Grube Christine, Germany
  • MineChrustenická Šachta, Czech Republic
  • CaveChuanlong Dong, China
  • CaveChua Tien, Vietnam
  • KarstChudnite Mostove, Bulgaria
  • ShowcaveCueva de Chufín, Spain
  • SubterraneaChufutKale, Russia
  • ShowcaveChuiyun Tongtian River, China
  • CaveChumash Painted Cave, United States of America
  • SubterraneaLa Chumbera, Spain
  • MineChuquicamata Copper Mine, Chile
  • CaveChurch Cave, Great Britain
  • SubterraneaPaddock - Churchill’s Secret Bunker, Great Britain
  • SubterraneaChurchill, Malta
  • ShowcaveChýnovská jeskyně, Czech Republic
  • SpringFonte Ciane, Italy
  • CaveGrotta di Ciccio Felice, Italy
  • ShowcaveJaskinia Ciemna, Poland
  • SpringFuente de los Cien Caños, Spain
  • SpringCierny Vyvieracka, Slovakia
  • KarstHoyo El Cimarrón, Guatemala
  • SubterraneaCincinnati Museum Center, United States of America
  • SubterraneaFort du Cindey, Switzerland
  • SubterraneaCirc romà, Spain
  • CaveCísařská jeskyně, Czech Republic
  • SubterraneaMuseo Paseo de la Cisterna, Argentina
  • SubterraneaCisternerne, Denmark
  • SubterraneaCisterne Romane Amelia, Italy
  • SubterraneaCisternone, Italy
  • SubterraneaCisternone Romano, Italy
  • SubterraneaCitadelle de Namur, Belgium
  • SubterraneaLa Cité du Volcan, France
  • CaveTunnel de lave Citron Galets, France
  • SubterraneaCity Museum, United States of America
  • KarstCiudad Encantada, Spain
  • CaveCivil Defense Caves, United States of America
  • ShowcaveGrotte de Clamouse, France
  • ShowcaveCueva Clara de Enpalme, Puerto Rico
  • MineGrube Clara, Germany
  • CaveClarksville Cave, United States of America
  • SubterraneaCunicoli di Claudio, Italy
  • ShowcaveClearwater Cave, Malaysia
  • MineClearwell Caves, Great Britain
  • ShowcaveSt. Clements Caves, Great Britain
  • CaveCliff Cave, United States of America
  • MineCliffs Shaft Mine Museum, United States of America
  • SubterraneaClifton Cliff Jail, United States of America
  • SubterraneaCloaca Maxima, Italy
  • CaveGrotte du Clos del Pous, France
  • SubterraneaLe Clos des Roches, France
  • MinePhosphatières du Cloup d’Aural, France
  • MineC-Mine, Belgium
  • MineC.M.T. Underground Mine Tour, Australia
  • ShowcaveDevil’s Coach House, Australia
  • MineCoaltown Museum, New Zealand
  • CaveLas Cuevas de la Cobanerita, Guatemala
  • GorgeBarrancas del Cobre, México
  • ShowcaveGrotte de la Cocalière, France
  • SubterraneaGrotta di Cocceio, Italy
  • MineEntente Mine Cockerill, Luxembourg
  • ShowcaveGrutas de Cocona, México
  • CaveCody Caves Provincial Park, Canada
  • MineLa Miniera Di Cogne, Italy
  • CavePeștera Coiba Mare, Romania
  • CavePeștera Coiba Mică, Romania
  • SubterraneaSchloß Colditz Escape Tunnels, Germany
  • SpringCold Water Spring, United States of America
  • MineColeman Rock Shop & Crystal Mines, United States of America
  • CaveColes Cave, Barbados
  • GorgeCueva de Colín, Cuba
  • ShowcaveLes Coves del Collbato, Spain
  • ShowcaveGrotta di Collepardo, Italy
  • MineReplica Underground Coal Mine Experience, Australia
  • SubterraneaCovetes del Colomer, Spain
  • CaveCova d’es Coloms, Spain
  • CaveCova dels Coloms, Spain
  • ShowcaveGruta Colón, Uruguay
  • MineColonial Adit Underground Mine Tour, Canada
  • MineColorado School of Mines Museum, United States of America
  • CaveColorado Bend State Park, United States of America
  • MineColorado Provençal, France
  • CaveGruta Colorida, Brazil
  • ShowcaveColossal Cave, United States of America
  • SubterraneaColossal Cave, United States of America
  • SubterraneaColosseum, Italy
  • MineColowyo Mine, United States of America
  • ShowcavePeştera Comarnic, Romania
  • ShowcaveGrotte des Combarelles, France
  • GorgeCombe Grède, Switzerland
  • ShowcaveGrotte et Abime de Comblain-au-pont, Belgium
  • MineComet Gold Mine, Australia
  • MineCompromise Mine, United States of America
  • SpringFuente Concejo, Spain
  • KarstLas Conchas, Guatemala
  • CaveConch Bar Caves, Turks and Caicos Islands
  • ShowcaveCongoman Cave and Restaurant, Tanzania
  • CaveHang Con Moong, Vietnam
  • MineZeche Consolidation, Germany
  • KarstCirque de Consolation, France
  • MineConsolidated Gold Mines, United States of America
  • SubterraneaMuseo della Civiltà Contadina, Italy
  • CaveGrotte Conturines, Italy
  • CaveCuevas El Convento, Puerto Rico
  • CaveGrotta Conza, Italy
  • SubterraneaCook Museum, United States of America
  • CaveCooper’s Cave, United States of America
  • SubterraneaCopán, Honduras
  • ShowcaveCoral Caverns, United States of America
  • KarstCoral Lagoon, Malta
  • SubterraneaMănăstirea Corbii de Piatră, Romania
  • ShowcaveAntro del Corchia, Italy
  • CaveCorfu Cave Tour, Greece
  • MineSentiero e gallerie minerarie del Cornacchino, Italy
  • SubterraneaGrottes du Cornadore, France
  • CaveCorner Brook Cave, Canada
  • ShowcaveBuca del Corno, Italy
  • CaveCoronado Cave, United States of America
  • CaveCueva Coro Trasito, Spain
  • CaveGrotte de la Glacière de Corrençon, France
  • MineCorris Mine Explorers, Great Britain
  • ShowcaveCosmic Caverns, United States of America
  • CaveGrotte Cosquer, France
  • MineMina Costanaza Logrosán, Spain
  • MineCoteau Freedom Mine, United States of America
  • KarstSima de las Cotorras, México
  • GorgeLa Cotte de St Brelade, Great Britain
  • KarstCotton Sinkhole, China
  • SubterraneaCoudenberg Palace, Belgium
  • MineCoudersport Ice Mine, United States of America
  • ShowcaveGrottes de Cougnac, France
  • SubterraneaGabriel Coulet, France
  • MineThe Country Boy Mine, United States of America
  • MineMusée de la Mine Couriot, France
  • MineDahlonega Courthouse Gold Museum State Historic Site, United States of America
  • SubterraneaCouvre Porte, Malta
  • CaveCueva de Covaciella, Spain
  • CaveSanta Cueva de Covadonga, Spain
  • ShowcaveCueva de Covalanas, Spain
  • GorgeGorges de la Covatanne, Switzerland
  • CaveCove Cave, Great Britain
  • CaveCove Cave, Ireland
  • CaveCoxcatlán Cave, México
  • ShowcaveGrutas de Coyame, México
  • KarstCracked Lake, Georgia
  • SubterraneaChapel of Our Lady of the Crag, Great Britain
  • ShowcaveCrag Cave, Ireland
  • MineCrater of Diamonds State Park, United States of America
  • CaveCraters of the Moon, United States of America
  • CaveGrottes de Cravanche, France
  • SubterraneaMaison des Pierreux de Crazannes, France
  • MineCreede Underground Mining Museum, United States of America
  • KarstSentier karstique de Crégols, France
  • MineCresson Mine, United States of America
  • SubterraneaFestungsmuseum Crestawald, Switzerland
  • ShowcaveCreswell Crags, Great Britain
  • CaveGrotte du Crête de Vaas, Switzerland
  • KarstCreugenat, Switzerland
  • SubterraneaCricova Galeriile Subterane, Moldova
  • SubterraneaCripta duomo Città di Castello, Italy
  • CaveCripta Basiliana di San Michele, Italy
  • MineCrisson Gold Mine, United States of America
  • ShowcaveGrutas de Cristal, Spain
  • SubterraneaGrotta dei Cristalli, Switzerland
  • MineMine Cristal, Canada
  • SubterraneaManastir Crna Reka, Serbia
  • SubterraneaCrocodile Harry, Australia
  • KarstMolinetto della Croda, Italy
  • CaveAbri de Cro-Magnon, France
  • SubterraneaCrowborough Caves, Great Britain
  • MineCrow Creek Mine, United States of America
  • CaveCrowley Lake Columns, United States of America
  • ShowcaveCrown Cave, China
  • SubterraneaCruachan Power Station, Great Britain
  • SubterraneaKnights Halls, Israel
  • CaveCrvena Stijena, Montenegro
  • KarstCrveno Jezero, Croatia
  • SubterraneaCrypte archéologique de l’île de la Cité, France
  • ShowcaveCrystal Cave, United States of America
  • ShowcaveCrystal Cave, Bermuda
  • SubterraneaThe Crystal Caves, Australia
  • ShowcaveCrystal Cave of Farcu Mine, Romania
  • CaveCrystal Cave, Iran
  • CaveCrystal Ball Cave, United States of America
  • MineCrystal Gold Mine, United States of America
  • ShowcaveCrystal Grottoes Caverns, United States of America
  • ShowcaveCrystal Lake Cave, United States of America
  • ShowcaveCrystal Cave, United States of America
  • ShowcaveCrystal Onyx Cave, United States of America
  • ShowcaveCrystal Cave Park, United States of America
  • SubterraneaCrystal Shrine Grotto, United States of America
  • ShowcaveCrystal Caverns at Hupp’s Hill, United States of America
  • ShowcaveCrystal Cave, United States of America
  • CaveCserszegtomaj barlang, Hungary
  • CaveCsodabogyós-barlang, Hungary
  • MineCsolnoki Bányászklub Múzeum, Hungary
  • CaveCuarenta Casas, México
  • CaveCuarto-Cuarto Cave, The Philippines
  • SubterraneaCuatro Puertas, Spain
  • ShowcaveCub Run Cave, United States of America
  • ShowcaveCüceler Mağarası, Turkey
  • SubterraneaCủ Chi Tunnels, Vietnam
  • CaveCueva Cuesta Palmarito, México
  • CaveGrutas de Cuetzalan, México
  • CaveLa Cuevona, Spain
  • ShowcaveCova es Cuilleram, Spain
  • SubterraneaÇukurören Yeraltı Şehri, Turkey
  • MineCullinan Mine, South Africa
  • SubterraneaCulver Hole, Great Britain
  • SubterraneaCuma - Antro della Sibilla, Italy
  • ShowcaveCumberland Caverns, United States of America
  • KarstGrutas de Cunén, Guatemala
  • SubterraneaCurraghmore House, Ireland
  • ShowcaveCurrent River Cavern, United States of America
  • ShowcaveGrotta di Curtomartino, Italy
  • CaveGrotte Cussac, France
  • CaveSt Cuthbert’s Cave, Great Britain
  • ShowcaveCutta Cutta Caves, Australia
  • KarstCuzamá Cenotes, México
  • CaveCave of Cyclops, Greece
  • SubterraneaCave of the Cyclops, Cyprus
  • MineSztolnia "Czarny Potok" w Tarnowskich Gorach, Poland
  • ShowcaveDa’an Cave, China
  • CaveDabarska pećina, Bosnia and Herzegovina
  • SubterraneaUntertageverlagerung Dachs 1, Germany
  • SubterraneaDaciyan, China
  • SubterraneaDada Harir Stepwell, India
  • ShowcaveDa Dung Mountain Caves, Vietnam
  • ShowcaveDaegeumgul, South Korea
  • SubterraneaDahan Stronghold, China
  • ShowcaveRoung Dai Ho, Cambodia
  • GorgeLes gorges du Daillet, Switzerland
  • SubterraneaFort de Dailly, Switzerland
  • ShowcaveDaimasu shonyudo, Japan
  • KarstDaisekirinzan, Japan
  • CaveDakhovskaya Cave, Russia
  • ShowcaveGħar Dalam, Malta
  • SubterraneaHeidenkapelle, France
  • SubterraneaDalton Gang Museum and Escape Tunnel, United States of America
  • SubterraneaDamanhur Temple, Italy
  • CaveCueva de Damas, Costa Rica
  • ShowcavePeştera Dambovicioara, Romania
  • SubterraneaDambulla, Sri Lanka
  • CaveDamianos Cave, Greece
  • ShowcaveDamlatas Magarasi, Turkey
  • ShowcaveDan-yr-Ogof - National Showcaves Centre for Wales, Great Britain
  • ShowcaveDandak Gufa, India
  • CaveDaneilshöhle, Germany
  • CaveDanger Cave, United States of America
  • GorgeDanggu Gorge, Australia
  • MineDannemora Gruvor, Sweden
  • ShowcaveDarband Cave, Iran
  • KarstWadi Darbat Falls, Oman
  • KarstDarby’s Cave, Antigua & Barbuda
  • ShowcaveGrotte de Dargilan, France
  • SubterraneaLa Mina de Daroca, Spain
  • SubterraneaDarwin WWII Oil Storage Tunnels, Australia
  • MineMiniere di Darzo, Italy
  • KarstDashiwei Tiankeng, China
  • KarstDat Taw Gyaint Waterfall, Myanmar
  • ShowcaveDat Taw Taung Cave, Myanmar
  • MineDaugbjerg Kalkgruber, Denmark
  • ShowcaveHang Đầu Gỗ, Vietnam
  • CaveDaveli’s Cave, Greece
  • SubterraneaDavid Gareja, Georgia
  • SubterraneaDavid Hasselhoff Museum, Germany
  • SubterraneaDaxiangshan Grottoes, China
  • MineHistoric Daydream Mine, Australia
  • SubterraneaDazu Grottoes, China
  • SubterraneaD Dupleks, Latvia
  • CaveDead Man’s Cave, Great Britain
  • MineDean Heritage Centre, Great Britain
  • KarstDean’s Blue Hole, Bahamas
  • MineCentral Deborah Gold Mine, Australia
  • SubterraneaDe Castellane, France
  • MineMusée du Patrimoine Industriel et Minier, France
  • ShowcaveDechenhöhle, Germany
  • CaveDecorah Ice Cave, United States of America
  • SubterraneaDedeli Konak, Turkey
  • KarstDeedote Blue Lagoon, Myanmar
  • ShowcaveGua Payau, Malaysia
  • GorgeDeer Creek Narrows, United States of America
  • CaveDeer Lick Cave, United States of America
  • SubterraneaDeinhard Kellermuseum, Germany
  • MineDekor 1 Gypsum Mine, Russia
  • MineDelaware Copper Mine, United States of America
  • SpringDe Leon Springs, United States of America
  • SubterraneaDélirium Café, Belgium
  • MineDelprats Underground Tourist Mine, Australia
  • ShowcaveDemanovska L’adova Jaskyna, Slovakia
  • ShowcaveDemanovska Jaskyna Slobody, Slovakia
  • SubterraneaDemeter’s Crypt, Russia
  • CaveDemir Baba, Bulgaria
  • ShowcaveGrotte des Demoiselles, France
  • CaveDenisova, Russia
  • SubterraneaDerinkuyu Yeraltı Şehri, Turkey
  • SubterraneaDerlon Hotel Museum Cellar, Netherlands
  • SubterraneaDesert Cave Hotel, Australia
  • SubterraneaDeutsches Bergbau Museum, Germany
  • SubterraneaDeutsches Bunkermuseum, Germany
  • MineDeutsches Goldmuseum, Germany
  • SubterraneaDeutsches Museum, Germany
  • MineAbenteuer Bergwerk Bernsteinzimmer, Germany
  • ShowcaveDevetashka peshtera, Bulgaria
  • ShowcaveGrotte de la Devèze, France
  • KarstDevil’s Bridge, Antigua & Barbuda
  • CaveDevil’s Den Cave, United States of America
  • KarstDevil’s Den, United States of America
  • CaveDevil’s Den, United States of America
  • KarstDevil’s Hole, Bermuda
  • CaveDevil´s Hole, Great Britain
  • CaveDevil’s Icebox Cave, United States of America
  • CaveDevil’s Ice Box, United States of America
  • KarstDevil’s Kettle, United States of America
  • KarstDevil’s Millhopper, United States of America
  • KarstDevil’s Punchbowl, Great Britain
  • KarstDevil’s Sinkhole, United States of America
  • KarstDevil’s Well, United States of America
  • SubterraneaDewstow Gardens and Grottoes, Great Britain
  • SubterraneaDhank Caves, India
  • CaveCueva del Diablo, Bolivia
  • ShowcaveCaverna do Diabo, Brazil
  • CaveCueva del Diabolo, Spain
  • SubterraneaDiamante Falls, Costa Rica
  • CaveCueva del Diamante, Perú
  • ShowcaveDiamond Caverns, United States of America
  • ShowcaveDiamond Cave, Japan
  • SubterraneaHotel Diar el Barbar, Tunisia
  • CavePozzo del Diavolo, Italy
  • CaveDich Long Cave and Pagoda, Vietnam
  • KarstDidyma Caves, Greece
  • SpringLekėčių Didysis šaltinis, Lithuania
  • CaveDiebeshöhle, Germany
  • SubterraneaDiefenbunker, Canada
  • ShowcaveKarsthöhle Dienstedt, Germany
  • CaveBurghöhle Dietfurt, Germany
  • MineMina La Dificultad, México
  • SubterraneaDigger’s Dream Underground Home, Australia
  • ShowcaveDike Paku Gupha, Nepal
  • ShowcaveDiktaion Antron, Greece
  • CaveDilek Magarasi, Turkey
  • ShowcaveDim Magarasi, Turkey
  • CaveGrotte de Dimba, République Démocratique du Con
  • SubterraneaDimbulagala, Sri Lanka
  • ShowcaveDimnice Jama, Slovenia
  • CaveDinosaur Caves Park, United States of America
  • CaveCaverna del Dio Mithra, Italy
  • SpringFosse Dionne, France
  • GorgeGorges de la Diosaz, France
  • ShowcaveDiósgyör-Tapolca barlang, Hungary
  • SubterraneaDi Shui Dong, China
  • ShowcaveDivaška Jama, Slovenia
  • SubterraneaDivine Cave Experience, Greece
  • SpringDivje Jezero, Slovenia
  • SubterraneaDivnogorsky Uspensky Cave-Monastery, Russia
  • ShowcaveDixie Caverns, United States of America
  • CaveĐalovića Pecina, Montenegro
  • CaveDjara Cave, Egypt
  • ShowcaveDjavolskoto Garlo Cave, Bulgaria
  • ShowcaveDjevojačka Pećina, Bosnia and Herzegovina
  • ShowcaveDjurovica Jama, Croatia
  • SubterraneaPřečerpávací vodní elektrárna Dlouhé Stráně, Czech Republic
  • CaveDo-Ashcaft Cave, Iran
  • CaveSiju Dobakhol, India
  • KarstDobroselički Prerast, Serbia
  • ShowcaveDobrostan Pearl Cave, Bulgaria
  • ShowcaveDobsinska Ladova Jaskyna, Slovakia
  • CaveDoktorshöhle, Germany
  • MineDolaucothi Gold Mine, Great Britain
  • KarstDolinenweg Hengen, Germany
  • CaveDoling Cave, United States of America
  • SubterraneaDolní Vĕstonice, Czech Republic
  • CaveDombashawa Rocks and Painted Cave Site, Zimbabwe
  • SubterraneaGurra Antike e Domgjonit, Albania
  • ShowcaveJaskyna Domica, Slovakia
  • SubterraneaDom Im Berg, Austria
  • ShowcaveGrotte de Domme, France
  • MineMaison du Fer à Dompierre, France
  • SubterraneaMuches de Domqueur, France
  • SubterraneaDOMunder, Netherlands
  • KarstDonauversickerung, Germany
  • ShowcaveCueva de Don Juan, Spain
  • CaveCueva de Don Justo, Spain
  • GorgeDonnersbachklamm, Austria
  • ShowcaveDoolin Cave, Ireland
  • CaveDorawaka Ethubandi Cave, Sri Lanka
  • GorgeDorfbachklamm, Germany
  • SubterraneaDorking Caves, Great Britain
  • SubterraneaEisstollen Dornburg, Germany
  • GorgeDorohacchō Gorge, Japan
  • MineDorotheastolln, Germany
  • MineDos Brazos de Rio Tigre, Costa Rica
  • CaveDoseongul, South Korea
  • KarstCueva de las dos Puertas, Spain
  • MineMiniere di Dossena, Italy
  • ShowcaveGrotta dei Dossi, Italy
  • SubterraneaFort de Douaumont, France
  • SpringSource du Doubs, France
  • SubterraneaDougout Ranch, United States of America
  • ShowcaveTham Doun, Laos
  • GorgeDover Stone Church, United States of America
  • SubterraneaDowa Rajamaha Viharaya, Sri Lanka
  • SubterraneaDown to Erth, Australia
  • ShowcaveCuevas del Drach, Spain
  • CaveDrachenhöhle, Austria
  • CaveDrachenloch, Switzerland
  • GorgeEisenacher Drachenschlucht, Germany
  • CaveGruta del Drago, Panama
  • SubterraneaCaverne du Dragon, France
  • ShowcaveDragon Cave, China
  • SubterraneaGrotta della Dragonara, Italy
  • SubterraneaDragon Hall Undercroft, Great Britain
  • KarstDragon Hole, China
  • ShowcaveCave Of The Dragon Kastoria, Greece
  • ShowcaveMuseo Cueva de Dragut, Spain
  • SubterraneaDrakelow Tunnels, Great Britain
  • CaveDrakospilia, Greece
  • CaveDrakonina Pecina, Croatia
  • ShowcaveGrotte de la Draye Blanche, France
  • CaveDreidärrischenhöhle, Austria
  • CaveDreieingangshöhle, Germany
  • MineDrei Kronen & Ehrt, Germany
  • KarstWasserfall Dreimühlen, Germany
  • MineSchwerspatmuseum Dreislar, Germany
  • SubterraneaMuzey Drevnego Cheloveka, Russia
  • SpringDrilon Spring, Albania
  • ShowcaveJaskyna Driny, Slovakia
  • MineDrive-in Mine, Australia
  • ShowcaveSpilaio Drogkarati, Greece
  • SubterraneaLes Drois Glands, Luxembourg
  • KarstDruidenhain, Germany
  • CaveGrotte des Druides, France
  • CaveDubočka Pećina, Serbia
  • MineDucktown Basin Museum, United States of America
  • CaveHang Đức Mẹ, Vietnam
  • SubterraneaDudley Canal Tunnels, Great Britain
  • CaveLa Gruta Del Duende, México
  • MineHistorisches Kuperbergwerk Düppenweiler, Germany
  • SubterraneaMuseumsbunker Düppenweiler, Germany
  • SubterraneaDuivelsgrot, Netherlands
  • SpringDuman, Bosnia and Herzegovina
  • CaveDumdalen Grotter, Norway
  • SubterraneaDunaskin Open Air Museum, Great Britain
  • ShowcaveDunbar Cave, United States of America
  • CaveDuncan Escarpment, Canada
  • SubterraneaDungeshwari, India
  • SubterraneaDunhuang Mogao Caves, China
  • ShowcaveDunmore Caves, Ireland
  • SpringDunning’s Spring, United States of America
  • SubterraneaDunsthöhle, Germany
  • CaveDunston Cave, Trinidad and Tobago
  • ShowcaveDupnisa Mağarası, Turkey
  • SubterraneaDupont Underground, United States of America
  • MinePaseo Túnel Minería Durango, México
  • ShowcaveDureb Caves, Namibia
  • MineDurham Mining Museum, Great Britain
  • GorgeGorges du Durnand, Switzerland
  • CavePeștera Duruitoarea, Moldova
  • MineDust Devil Mine, United States of America
  • SpringDva Oka, Croatia
  • KarstDyavolski Most, Bulgaria
  • KarstDyrhólaey, Iceland
  • KarstDzibilchaltún Cenote, México
  • KarstCenote Dzitnup, México
  • CaveJaskinia Ku Dziurze, Poland
  • KarstCenote Dzonbacal, México
  • ShowcaveEagle Cave, United States of America
  • MineEagle and High Peak Mine, United States of America
  • SubterraneaTomb of the Eagles, Great Britain
  • ShowcaveEaik Sa Ta Ya Cave, Myanmar
  • MineEarby Mining Museum, Great Britain
  • MineEast Pool Mine, Great Britain
  • KarstEastwater Cavern, Great Britain
  • GorgeEbbor Gorge, Great Britain
  • CaveGrotte d’Ebbou, France
  • ShowcaveEberstadter Tropfsteinhöhle, Germany
  • GorgeEchidna Chasm, Australia
  • ShowcaveEcho Caves, South Africa
  • CaveEcho Amphitheater, United States of America
  • CaveEckert James River Cave, United States of America
  • MineEckley Miners’ Village, United States of America
  • CaveGruta dos Ecos, Brazil
  • MineEcton Mine Educational Centre, Great Britain
  • ShowcaveEdakkal, India
  • MineBesucherstollen Grube Edelstein, Germany
  • MineMina El Edén, México
  • ShowcaveEdessa Waterfalls Cave, Greece
  • MineCSM Edgar Experimental Mine, United States of America
  • SubterraneaKasematte Edling Süd, France
  • MineEdna May Gold Mine, Australia
  • SubterraneaEgkleistra, Cyprus
  • SubterraneaEglise monolithe Saint Jean, France
  • SubterraneaEgloffsteiner Felsenkeller, Germany
  • SubterraneaMusée des Égouts, Belgium
  • GorgeEhnbachklamm, Austria
  • MineZinngrube Ehrenfriedersdorf, Germany
  • KarstEichener See, Germany
  • SubterraneaBunker Eichenthal, Germany
  • SpringEin Gedi, Israel
  • ShowcaveEinhornhöhle, Germany
  • ShowcaveEinhornhöhle, Austria
  • CaveEinödhöhle, Austria
  • GorgeEisenbreche Klamm, Germany
  • MineEisensteinstollen, Germany
  • ShowcaveEisensteinhöhle, Austria
  • KarstEisinger Löcher, Germany
  • CaveEiskapelle, Germany
  • CaveEiskogelhöhle, Austria
  • SubterraneaEispalast Jungfraujoch, Switzerland
  • SubterraneaDachstein Eispalast, Austria
  • SubterraneaEispavillon Mittelallalin, Switzerland
  • ShowcaveEisriesenwelt, Austria
  • ShowcaveCueva de Ekain, Spain
  • SubterraneaEkotechnické Museum, Czech Republic
  • MineEl-Haouaria, Tunisia
  • ShowcaveEl Arcotete Parque Ecoturístico, México
  • CaveEl Capitan Cave, United States of America
  • SpringEl Capulín Natural Pool, El Salvador
  • ShowcaveCuevas de El Castillo y Las Monedas, Spain
  • MineEl Cerrejón Coal Mine, Colombia
  • CaveCueva El Chorreadero, México
  • ShowcaveCoves del Cogul, Spain
  • CaveCueva de El Conejar, Spain
  • SubterraneaEl Depósito, The Philippines
  • MineEldorado Canyon Mine Tours, United States of America
  • SubterraneaElectric Mountain Visitor Centre, Great Britain
  • KarstArco dell’Elefante, Italy
  • CaveGrutas el Encanto, Guatemala
  • SubterraneaElephanta Caves, India
  • SubterraneaBodega El Fabulista, Spain
  • CaveElfengrotte, Germany
  • CaveElijah’s Cave, Israel
  • SubterraneaElkep Evi Cave Houses, Turkey
  • CaveIce Caves Mountain, United States of America
  • SubterraneaJaunpils Elles Kalns, Latvia
  • CaveSpilea Ellinokamára - Ellinokamára Cave, Greece
  • SubterraneaEllinwood Underground Tunnels, United States of America
  • MineElliot Lake Nuclear and Mining Museum, Canada
  • MineElliott Underground Quarry, United States of America
  • SubterraneaEllora Caves, India
  • CaveEl Majé Caves, Panama
  • CaveEl Malpais National Monument, United States of America
  • SubterraneaEl Meson de la Cava, Dominican Republic
  • CaveEl Nicho Waterfall & Cave, Cuba
  • ShowcaveCueva de El Pendo, Spain
  • CaveEl Puente Natural, Panama
  • CaveCavernas El Sauce, Argentina
  • GorgeEl Tajo Canyon, Spain
  • ShowcaveCoves del Toll, Spain
  • KarstEl Torcal de Antequera, Spain
  • SubterraneaEl Zanjón de Granados, Argentina
  • MineEmerald Village, United States of America
  • MineEmilianusstollen, Germany
  • CavePestera Emil Racovita, Moldova
  • SubterraneaMuzeul de Speologie "Emil Racoviţă", Romania
  • ShowcaveEmine Bair Khasar Cave, Russia
  • MineEmmaville Mining Museum, Australia
  • MineEmpire Mine State Historic Park, United States of America
  • CaveEmpire Cave, United States of America
  • KarstLaguna Encantada, Guatemala
  • CaveGruta das Encantadas, Brazil
  • SpringPoço Encantado, Brazil
  • ShowcaveEnchanted Cave, The Philippines
  • ShowcaveEndless Caverns, United States of America
  • ShowcaveCueva de Los Enebralejos, Spain
  • MineMaison du Mineur et des Énergies, France
  • MineEngelsbergs Bruk, Sweden
  • GorgeEngenlochschlucht, Austria
  • MineSchieferbergwerk im Engi, Switzerland
  • ShowcaveEnglebrecht Cave, Australia
  • CaveEnku Bora, Japan
  • ShowcaveEnoshima Iwaya Cave, Japan
  • CaveGrotta Entella, Italy
  • MineEnterprise Pit Mine Lookout, Australia
  • ShowcaveEntrische Kirche, Austria
  • ShowcaveFurna do Enxofre, Portugal
  • SubterraneaLe Blockhaus d’Éperlecques, France
  • SubterraneaEshab-i Kehf - Grotto of Seven Sleepers, Turkey
  • MineMusée de la mine Epinac, France
  • CaveRed Sandstone of Eppenbrunn, Germany
  • CaveGrotte d’Eprave, Belgium
  • ShowcaveGrotte di Equi Terme, Italy
  • KarstEramosa Karst, Canada
  • KarstSteinerne Rinne bei Erasbach, Germany
  • SubterraneaTham Erawan, Thailand
  • KarstErawan Falls, Thailand
  • MineBergbau- und Heimatmuseum Erbendorf, Germany
  • SubterraneaErbendorfer Felsenkeller, Germany
  • KarstKarstlehrpfad Breitscheid-Erdbach, Germany
  • ShowcaveErdmannshöhle, Germany
  • SubterraneaBunker WH-767 “Erlkönig”, Germany
  • GorgeErma Gorge, Bulgaria
  • MineMuseo Minero de Riotinto "Ernest Lluch", Spain
  • MineStollen Erwein II, Germany
  • MineErzberg, Austria
  • MineTropfsteinhöhle Erzenhausen, Germany
  • SubterraneaEsbelli Evi, Turkey
  • MineMusée de la mine d’Escaro-Aytua, France
  • MineMusée de la mine et des traditions populaires d’Escaudain, France
  • SubterraneaCasemate Esch, France
  • MineMinera Escondida, Chile
  • KarstCenote Escondido, México
  • ShowcaveGruta do Escoural, Portugal
  • SubterraneaEski-Kermen, Russia
  • ShowcaveGouffre d’Esparros, France
  • CaveEsperhöhle, Germany
  • SubterraneaSantuario Virgen de la Esperanza, Spain
  • CaveGruta del Espiritu Santo, El Salvador
  • CaveLa Cueva del Esplendor, Colombia
  • SubterraneaBalma d’Esplugues, Spain
  • SubterraneaEssex Secret Bunker, Great Britain
  • SubterraneaEsterlin, France
  • ShowcaveGrutas de la Estrella, México
  • CaveEsztáz-kői-barlang, Hungary
  • SubterraneaMuseo Nazionale Etrusco, Italy
  • KarstCascade d’Étufs, France
  • MineMusée Eugène Pesch, Luxembourg
  • MineMina Eugènia, Spain
  • SubterraneaTunnel of Eupalinus, Greece
  • MineEureka Tunnel, United States of America
  • SubterraneaEureka Springs Underground, United States of America
  • CaveCave of Euripides, Greece
  • SubterraneaEuston Lost Tunnels, Great Britain
  • SubterraneaEvakueringshulen, Norway
  • KarstSentier karstique à Excideuil, France
  • SubterraneaExeter’s Underground Passages, Great Britain
  • SubterraneaExpo Cave Karst, Slovenia
  • MineCentro de Interpretación de la minería en Extremadura, Spain
  • SubterraneaEysturoyartunnilin, Faroe Islands
  • CaveGruta da Fada, Brazil
  • ShowcaveGouffre de la Fage, France
  • SubterraneaMuseo Faggiano, Italy
  • ShowcaveFairy Cave, Malaysia
  • ShowcaveBuchan Caves - Fairy Cave, Australia
  • ShowcaveFakıllı Mağarası, Turkey
  • SubterraneaBunker Falkenhagen, Germany
  • CaveFalkensteiner Höhle, Germany
  • MineFalkirk Mine, United States of America
  • KarstFalling Waters Sink, United States of America
  • MineKnappenloch Fallwindes, Austria
  • ShowcaveGrotte di Falvaterra, Italy
  • CaveCueva del Fantasma, Venezuela
  • ShowcaveFantastic Caverns, United States of America
  • ShowcaveFantasy Cave, Bermuda
  • KarstFaqra Natural Bridge, Lebanon
  • KarstI Faraglioni, Italy
  • KarstFardrum Lough, Roosky Lough, and Green Lough, Ireland
  • ShowcaveGrotte à Farinet, France
  • SubterraneaFaris Caves, United States of America
  • SubterraneaFarm8, South Korea
  • CaveGrotta del Farneto, Italy
  • ShowcaveCentro de Interpretación de la Fauna Glacial, Spain
  • SubterraneaLe Faux Saulnier, France
  • SubterraneaFayes Underground Home, Australia
  • MineCentre Minier de Faymoreau, France
  • ShowcaveBuchan Caves - Federal Cave, Australia
  • SubterraneaFederal Reserve Bank of New York Gold Vault, United States of America
  • MineFeengrotten, Germany
  • ShowcaveGrotte aux Fées, Switzerland
  • MineGrube Feggendorfer Stolln, Germany
  • MineFelicitas Heilstollen, Germany
  • MineMina Felipe dos Santos, Brazil
  • MineBesucherbergwerk Fell, Germany
  • CaveFels Cave, Vanuatu
  • SubterraneaÖsterreichisches Felsbildermuseum, Austria
  • MineFelsendome Rabenstein, Germany
  • SubterraneaNürnberger Felsengänge, Germany
  • CaveFelsenkirche Idar-Oberstein, Germany
  • KarstHemer Felsenmeer, Germany
  • CaveGruta do Fendão, Brazil
  • ShowcaveFengjie Shenxian Cave, China
  • ShowcaveFengyu Cave, China
  • CaveFerekidis Cave, Greece
  • SubterraneaCisterne Romane Fermo, Italy
  • ShowcaveFern Grotto, United States of America
  • MineFern and Roman Caves, Great Britain
  • ShowcaveLa Ferrassie, France
  • MineFerreira’s Mine, South Africa
  • MineFerropolis, Germany
  • SubterraneaFertőrákosi Barlangszínház, Hungary
  • SpringPoço Fervedouro, Brazil
  • ShowcaveŠpilja Feštinsko Kraljevstvo, Croatia
  • SubterraneaLycian Tombs at Fethiye, Turkey
  • CaveFeuchter Keller, Austria
  • ShowcaveGrotta del Fico, Italy
  • GorgeGorges du Fier, France
  • ShowcaveFig Tree Cave, Australia
  • ShowcaveFikirini Three Sister Caves, Kenya
  • MineFilipinas Larimar Mine, Dominican Republic
  • SubterraneaSt Fillan’s Cave, Great Britain
  • SubterraneaDomaine Filliatreau, France
  • SubterraneaCaves of Filopappou Hill, Greece
  • CaveFinca Ixobel River Cave Trip, Guatemala
  • MineFinca las Minas, Costa Rica
  • SubterraneaCova de les Finestres, Spain
  • CaveFingal’s Cave, Great Britain
  • CaveFinnforsrövarnas grotta, Sweden
  • GorgeFinnich Glen, Great Britain
  • CaveFinsteres Loch, Germany
  • MineBesuchsbergwerk Finstergrund, Germany
  • MineSchaubergwerk "Finstertal" Asbach, Germany
  • CaveGrotte Finzolua Ndombolozi, République Démocratique du Con
  • CaveGrotta Fioravante, Italy
  • MineFire Clay Caverns, Australia
  • ShowcaveFisher Cave, United States of America
  • CaveFisher’s Cave, United States of America
  • GorgeFish River Canyon, Namibia
  • SpringSorgente Fiumelatte, Italy
  • SpringFive Dragon Pool, China
  • KarstFive-Flower Lake, China
  • MineFlaat Nikkelgruve, Norway
  • CaveFlagstaff Lava River Cave, United States of America
  • MineMusée des Mines et des Carrières à Flamanville, France
  • MineFlascharův důl, Czech Republic
  • MineFlogbergets gruva, Sweden
  • ShowcaveGrottes de Floreffe, Belgium
  • MineFlorence Mine Heritage Centre, Great Britain
  • ShowcaveFlorida Caverns State Park, United States of America
  • SubterraneaFlorida Museum of Natural History, United States of America
  • MineParco Minerario Floristella Grottacalda, Italy
  • CaveFlour Cave, Israel
  • ShowcaveFloyd Collins’ Crystal Cave, United States of America
  • GorgeFlume Gorge, United States of America
  • SubterraneaFluweelengrot, Netherlands
  • CaveGruta do Fogo, Brazil
  • CaveFohlenhaus, Germany
  • MineBergbaumuseum Fohnsdorf, Austria
  • ShowcaveGrotte de Foissac, France
  • SpringElos Fokianou, Greece
  • MineFolldal Gamle Gruver, Norway
  • SubterraneaGrottes de Folx-Les-Caves, Belgium
  • MineParc Industriel et Ferroviaire du Fond-de-Gras, Luxembourg
  • KarstLe Fondry Des Chiens, Belgium
  • SubterraneaJosé Maria da Fonseca Wine Cellars, Portugal
  • ShowcaveGrotte de Font-de-Gaume, France
  • SubterraneaCisterna della Fontana del Calamo, Italy
  • SubterraneaCimitero delle Fontanelle, Italy
  • KarstSentier Karstique Font d’Urle, France
  • ShowcaveFontein Grot, Aruba
  • MineMinas Fonte Meu Bem Querer, Brazil
  • SpringFontaine de Fontestorbes, France
  • SubterraneaAbbaye Royale de Fontevraud, France
  • SpringNacimiento del Rio Ebro, Spain
  • ShowcaveGrottes de Fontirou, France
  • ShowcaveCova de la Font Major, Spain
  • ShowcaveGrotte de Fontrabiouse, France
  • ShowcaveFootwhistle Glowworm Cave, New Zealand
  • CaveCova Forada, Spain
  • ShowcaveForbidden Caverns, United States of America
  • SubterraneaForchheimer Keller, Germany
  • SubterraneaCriptoportico Forense, Italy
  • SubterraneaForestiere Underground Gardens, United States of America
  • ShowcaveL’Aven Grotte de la Forestière, France
  • SubterraneaFormula Center, Finland
  • SubterraneaLa Fornace di Barbablù, Italy
  • ShowcaveForos Cave, Greece
  • GorgeStrada della Forra, Italy
  • SubterraneaFort Amherst Tunnel Tour, Great Britain
  • SubterraneaFort Bonifacio Tunnel, The Philippines
  • SubterraneaFort Casso, France
  • SubterraneaForteiland, Netherlands
  • SubterraneaFort Hommet Gun Casemate, Great Britain
  • ShowcaveFort Rock Cave, United States of America
  • CaveFort Stanton Cave, United States of America
  • MineGrube Fortuna, Germany
  • SubterraneaParco Archaeologico Forza, Italy
  • SubterraneaLa Fosse de Forges, France
  • GorgeGorges de la Fou, France
  • ShowcaveGrotte du Foulon, France
  • CaveFountain Cave, United States of America
  • ShowcaveFountain Cavern, Anguilla
  • SubterraneaOuvrage du Four-à-Chaux, France
  • MineLes mines d’argent du Fournel, France
  • CaveFox River Caves, New Zealand
  • SubterraneaHöhlenburg Fracstein, Switzerland
  • ShowcaveCueva de los Franceses, Spain
  • ShowcaveFrancetova Jama, Slovenia
  • CaveΣπηλαιο Φραγχθι - Franchthi Cave, Greece
  • SubterraneaFranciscan Monastery, United States of America
  • CaveFrancisco Dagohoy Cave, The Philippines
  • SubterraneaTomba Francois, Italy
  • ShowcaveFrançois Leguat Giant Tortoise and Cave Reserve, Mauritius
  • SubterraneaFrank Aston Underground Museum, Australia
  • MineFranklin Mineral Museum & Mine Replica, United States of America
  • SubterraneaFranklin Court Underground Museum, United States of America
  • SubterraneaFrantoi Ipogei di Grottaglie, Italy
  • SubterraneaFrantoio Ipogeo Granafei, Italy
  • SubterraneaFrantoio Ipogeo Caffa, Italy
  • SubterraneaFrantoio Ipogeo Sternatia, Italy
  • ShowcaveGrotta Grande del Vento - Grotte di Frasassi, Italy
  • CaveTempio del Valadier - Santa Maria di Frasassi - Infrasaxa - Grotte di Frasassi, Italy
  • SubterraneaHöhlenmuseum Frasdorf, Germany
  • CaveGrotta dei Frati, Italy
  • CaveFrauenmauerhöhle, Austria
  • CaveGrotta del Freddo, Italy
  • MineFree Enterprise Health Mine, United States of America
  • MineStadt- und Bergbaumuseum Freiberg, Germany
  • CaveFurna de Frei Matias, Portugal
  • MineSchaubergwerk St. Anna am Freudenstein, Germany
  • MineHeilklimastollen Friedrich, Austria
  • MineFriedrich-Wilhelm-Stollen, Germany
  • SubterraneaFrihedsmuseet, Denmark
  • ShowcaveGouffre Friouato, Morocco
  • MineEisenerzbergwerk Frischglück, Germany
  • MineFröå gruva, Sweden
  • SubterraneaFromosa Boulevard Station, China
  • KarstFucha, Japan
  • ShowcaveFudo-kutsu, Japan
  • CaveCuevas de Fuentemolinos, Spain
  • ShowcaveCuevas de Fuentes de Leon, Spain
  • SubterraneaFestung Fürigen, Switzerland
  • MineFürstenzeche, Germany
  • SubterraneaGrüner Bräu Keller, Germany
  • ShowcaveFugaku Fuketsu, Japan
  • CaveFugoppe-dokutsu, Japan
  • SubterraneaFührerbunker, Germany
  • ShowcaveFuji-do, Japan
  • MineFukiya Copper Mine, Japan
  • ShowcaveFukuchani Ruins & Cave, Tanzania
  • CaveFukui Cave, Japan
  • CaveFulford Cave, United States of America
  • KarstPortail de Fully, Switzerland
  • CaveGruta da Fumaça, Brazil
  • MineMusée de l’ardoise de Fumay, France
  • ShowcaveFunakubo Shonyudo, Japan
  • ShowcaveFunatsu Tainai, Japan
  • CaveFun Fun Cave, Dominican Republic
  • KarstLough Funshinagh, Ireland
  • SpringFuntana Chistagna, Switzerland
  • KarstFuntensee, Germany
  • CaveFuraku Cave, Japan
  • ShowcaveFuren shonyudo, Japan
  • CaveParc National de Furfooz, Belgium
  • GorgeGola del Furlo, Italy
  • CaveGruta da Furninha, Portugal
  • ShowcaveFurong Dong, China
  • ShowcaveFutenma Cave, Japan
  • ShowcaveFuyang Cave, China
  • MineSilberstollen Gabe Gottes, Germany
  • SpringSorgente del Gabriele, Italy
  • SubterraneaGadara, Jordan
  • SubterraneaGoa Gajah, Indonesia
  • GorgeGorge de Galamus, France
  • CaveGalazia Spiliá - Blue Grotto, Greece
  • CaveGalázia Spiliá, Greece
  • CaveGalázia Spiliá - Blue Grotto - Korithi Cave, Greece
  • CaveCueva de la Galiana, Spain
  • CaveGrotta della Galleria Ferroviaria, Italy
  • SubterraneaVenta El Gallo, Spain
  • SubterraneaGamaoreum Japanese Cavern Site, South Korea
  • MineMiniera Gambatesa, Italy
  • SubterraneaGamirasu Otel, Turkey
  • SpringPozzo di Gammazita, Italy
  • CaveSinks of Gandy, United States of America
  • SubterraneaGavi Gangadhareswara, India
  • KarstValley of Gangala, Japan
  • ShowcaveGangcha Cave, China
  • SubterraneaGankutsu Hotel, Japan
  • MineKnappenloch Ganotz, Austria
  • ShowcaveGap Cave, United States of America
  • CaveGaping Ghyll, Great Britain
  • ShowcaveGrutas de Garcia, México
  • KarstGarden Of Caves, India
  • ShowcaveGardner Cave, United States of America
  • CaveSea Caves of the Gargano, Italy
  • ShowcaveGrottes Prehistorique de Gargas, France
  • GorgeGole del Garrafo, Italy
  • CaveGarvanitsa, Bulgaria
  • SubterraneaAtombunker Garzau, Germany
  • ShowcaveGasparee Caves, Trinidad and Tobago
  • ShowcaveGassel-Tropfsteinhöhle, Austria
  • MineGasteiner Heilstollen, Austria
  • KarstGatklettur, Iceland
  • CaveCueva del Gato, Spain
  • CaveGaub Cave, Namibia
  • SubterraneaLa Grotte de Gaulier, France
  • CaveStore Gaulstadgrotta, Norway
  • CaveGautschgrotte, Germany
  • MineMines Prehistòriques de Gavà, Spain
  • KarstPozo del Gavilán, México
  • MineParco Minerario Naturalistico di Gavorrano, Italy
  • ShowcaveGaxian Dong, China
  • SubterraneaGaziemir Yer Altı Şehri, Turkey
  • MineMestská a naftárska expozícia Gbely, Slovakia
  • CaveGcwihaba Caverns, Botswana
  • ShowcaveGedelme Mağarası, Turkey
  • MineGeevor Tin Mine, Great Britain
  • SubterraneaGeghard, Armenia
  • CaveGeissenklösterle, Germany
  • CaveGua Gelatik, Indonesia
  • CaveCave Church at Gellért Hill, Hungary
  • MineBanícke Múzeum Gelnica, Slovakia
  • CaveGrotta del Gelo, Italy
  • SubterraneaGemeentegrot, Netherlands
  • CaveGemini Bridges, United States of America
  • MineGems Museum, Myanmar
  • CaveCaverne Gendarme, France
  • SubterraneaLes Caves de la Genevraie, France
  • ShowcaveCueva de Genova, Spain
  • CaveGrotta del Genovese, Italy
  • SubterraneaGenovevahöhle bei Bell, Germany
  • CaveGenovevahöhle bei Kordel, Germany
  • MineMuseo dei Minerali della Gente di Rio, Italy
  • ShowcaveGenzan-kutsu, Japan
  • ShowcaveGeophysical Cave, Russia
  • MineFörderturm der Grube Georg, Germany
  • MineGeorge’s Gold Mine, Australia
  • SubterraneaGeraer Höhler, Germany
  • CaveSpilaion Gerani, Greece
  • SubterraneaJersey War Tunnels, Great Britain
  • SubterraneaGerman Naval Signals Headquarters, Great Britain
  • SubterraneaGerman Underground Hospital, Great Britain
  • SubterraneaLa Grotta Dei Germogli, Italy
  • MineCarriere souterraine de Gèromont, Belgium
  • MineErzweg Gersdorf, Germany
  • CaveKristallkluft Gerstenegg, Switzerland
  • SubterraneaGrotto of Gethsemane, Israel
  • ShowcaveGetu River Caves, China
  • SubterraneaGeulhemmergroeve, Netherlands
  • CaveGhardaia, Algeria
  • ShowcavePeştera Ghetarul Focul Viu, Romania
  • SubterraneaGhorawadi Caves, India
  • SpringGiant Springs, United States of America
  • ShowcaveGiant’s Cave, Great Britain
  • ShowcaveGiants Cave, Australia
  • GorgeGießenbachklamm, Germany
  • ShowcaveGrotta Gigante, Italy
  • CaveLa Cueva del Gigante, Honduras
  • SubterraneaCuevas del Gigante, Spain
  • SpringGihon Spring, Israel
  • CaveGila Cliff Dwellings, United States of America
  • GorgeGilfenklamm, Italy
  • CaveGillberga Gryte, Sweden
  • SubterraneaGilmerton Cove, Great Britain
  • SubterraneaGimhae Wine Cave, South Korea
  • CaveGimnyeongsagul, South Korea
  • CaveGimpel-Labyrinth, Austria
  • ShowcaveGinryu-do, Japan
  • KarstDer Karstwanderweg am Südharz, Germany
  • ShowcaveGoa Giri Putri Temple, Indonesia
  • MineMusée de la Mine et des Techniques Minière de Giromagny, France
  • ShowcaveGrotta Giusti Terme, Italy
  • CaveGjabakkahellir, Iceland
  • SubterraneaGjøvik Olympic Mountain Hall, Norway
  • ShowcaveGrotte de la Glacière, France
  • CaveCave of Padre Glandorff, México
  • MineGrube Glasebach, Germany
  • KarstQuellflur Kalksinter Glatt, Germany
  • ShowcaveJaskinia Głęboka, Poland
  • GorgeGleirschklamm, Austria
  • MineBesucherbergwerk Gleissinger Fels, Germany
  • KarstGlenamaddy Turlough, Ireland
  • MineGlengowla Mines, Ireland
  • MineGlen Osmond Mine Tour, Australia
  • ShowcaveGlenwood Caverns, United States of America
  • SpringGleßbrunnen, Germany
  • GorgeGletscherschlucht, Switzerland
  • ShowcaveGlifada, Greece
  • MineSchaubergwerk Frisch Glück Glöckl, Germany
  • CaveGruta da Glória, Brazil
  • KarstGlory Hole Waterfall, United States of America
  • MineQuarzitbruch Glossen, Germany
  • ShowcaveWaitomo Glowworm Grotto, New Zealand
  • MineSchaubergwerk „Gnade Gottes Erbstollen“, Germany
  • MineGo Below Underground Adventures, Great Britain
  • KarstGod’s Bridge, Great Britain
  • KarstDaraja la Mungu, Kenya
  • KarstGod’s Bridge, Great Britain
  • KarstGod’s Bridge, Great Britain
  • KarstDaraja la Mungu Kiwira, Tanzania
  • CaveGöpfelsteinhöhle, Germany
  • MineMine d’antimoine à Goesdorf, Luxembourg
  • MineBesucherbergwerk Im Gößner, Germany
  • ShowcaveGoetz-Höhle, Germany
  • CaveGötzingerhöhle, Germany
  • ShowcaveGökgöl Magarasi, Turkey
  • ShowcaveGokuraku-do, Japan
  • MineGoldbergbaumuseum Goldkronach, Germany
  • MineGoldBottom Mine Tours, Canada
  • MineGold Bug Mine, United States of America
  • MineGold Dredge 8, United States of America
  • CaveGolden Cathedral, United States of America
  • MineGoldfield Mine, United States of America
  • MineMuseum of the Goldfields, Australia
  • MineBesucherbergwerk Goldhausen, Germany
  • MineGold King Mine, United States of America
  • MineGold Reef City, South Africa
  • MineGold Road Mine Tours, United States of America
  • SpringGroße und Kleine Golke, Germany
  • SpringSorgenti Su Gologone, Italy
  • CaveSótano de las Golondrinas, México
  • CaveCueva de las Golondrinas, Puerto Rico
  • CaveCueva Golondrinas, Puerto Rico
  • CaveGolub Špilja, Croatia
  • CaveGolubinsky Proval, Russia
  • ShowcaveGolubnjaca Pecina, Croatia
  • SpringBlue Lake, Russia
  • SpringGoluboye Ozero, Russia
  • CaveGolubovitsa Cave, Bulgaria
  • SpringGoluboye Ozero Kabardino, Russia
  • SpringGoluboye Ozero Samara, Russia
  • ShowcaveGomantong Caves, Malaysia
  • ShowcaveGombasecka Jaskyna, Slovakia
  • SubterraneaGonawatta Ancient Caves, Sri Lanka
  • MineGoldmine Gondo, Switzerland
  • ShowcaveGoa Gong, Indonesia
  • SpringGongmutang, China
  • MineEisenbergwerk Gonzen AG, Switzerland
  • MineGood Enough Mine, United States of America
  • CaveGood Luck Cave, Malaysia
  • MineGoodluck Mine, Great Britain
  • CaveGreat Ocean Road, Australia
  • MineGörbehalmi Bányamúzeum, Hungary
  • SubterraneaGorge Underground, United States of America
  • KarstFuente del Gorgotón, Spain
  • MineSkansen Przemysłu Naftowego „Magdalena” w Gorlicach, Poland
  • GorgeGornerschlucht, Switzerland
  • MineMuzeum Górnictwa Węglowego, Poland
  • SubterraneaManastir Gornjak, Serbia
  • SpringGornjepoljski Vir, Montenegro
  • MineEcomuseo Miniere di Gorno, Italy
  • KarstGort River, Ireland
  • ShowcaveGossi Cave, South Korea
  • ShowcaveGosu Cave, South Korea
  • SubterraneaGoto Mall, South Korea
  • KarstGottesackerplateau, Germany
  • SubterraneaGotthard Basistunnel, Switzerland
  • GorgeGorges de Gouleyrous, France
  • SubterraneaVallée troglodytique des Goupillières, France
  • CaveGouvernéto Cave - Bears’ Cave, Greece
  • ShowcaveGrotte de Goyet, Belgium
  • GorgeGöynük Canyon, Turkey
  • ShowcaveGoyomatsu shonyudo, Japan
  • MineGruvmuseet Grängesberg, Sweden
  • MineBesucherbergwerk Graf Wittekind, Germany
  • CaveGraham Cave, United States of America
  • MineMina de Gramado, Brazil
  • MineGranatium, Austria
  • KarstGran Cenote, México
  • ShowcaveGrand Caverns, United States of America
  • ShowcaveGrand Arch, Australia
  • ShowcaveGrand Canyon Caverns, United States of America
  • GorgeGrand Canyon, United States of America
  • MineMaison du Mineur Grand-Combe, France
  • ShowcaveLes Grandes Canalettes, France
  • MineLe Grand Filon, France
  • MineGrandfontaine Musée Minéralogique et Minier, France
  • KarstGrand Gulf State Park, United States of America
  • ShowcaveGrotte du Grand Roc, France
  • GorgeGrands Goulets, France
  • GorgeGrand Staircase – Escalante National Monument, United States of America
  • CaveCaverna La Gran Galería, Costa Rica
  • ShowcaveGrapčeva Špilja, Croatia
  • SubterraneaGraselhöhle, Austria
  • SpringParco Naturale del Rio Grassano, Italy
  • ShowcaveGrasslhöhle, Austria
  • SubterraneaChampagne Alfred Gratien, France
  • MineBergbaumuseum Graubünden, Switzerland
  • SubterraneaMaisons troglodytes du Graufthal, France
  • SubterraneaGravina Sotterranea, Italy
  • CaveGreat Cave, Cayman Islands
  • SubterraneaGreat Bend Railroad Tunnel, United States of America
  • CaveGreat Chamber, United States of America
  • ShowcaveGreat Masson Cavern, Great Britain
  • ShowcaveGreat Onyx Cave, United States of America
  • MineGreat Orme Bronze Age Copper Mines, Great Britain
  • ShowcaveGreat Rutland Cavern, Great Britain
  • SubterraneaGreat Siege Tunnels, Great Britain
  • SubterraneaUnderground Great Wall, China
  • SubterraneaGreenbrier Bunker, United States of America
  • ShowcaveGreen Grotto Caves, Jamaica
  • CaveGreen’s Cave, United States of America
  • SubterraneaGreenwich Foot Tunnel, Great Britain
  • GorgeGreeves Creek, Australia
  • CaveGreig’s Scenic Caves, Canada
  • SubterraneaCaves Louis de Grenelle, France
  • ShowcaveGrgosova Špilja, Croatia
  • ShowcaveGriffener Tropfsteinhöhle, Austria
  • MineSchaubergwerk am Grillenberg, Austria
  • MineGrimes Graves, Great Britain
  • SubterraneaFelslabor Grimsel, Switzerland
  • SubterraneaKraftwerk Grimsel 2, Switzerland
  • CaveGrjótagjá, Iceland
  • CaveGrofova Jama, Slovenia
  • ShowcaveGronligrotta, Norway
  • GorgeGroppenstein- und Rabisch-Schlucht, Austria
  • CaveGroße Grotte, Germany
  • CaveGroßer Lochstein, Germany
  • CaveGroße Scheuer, Germany
  • SubterraneaGrotesquery, Czech Republic
  • SubterraneaMaria SS. Addolorata a Grottasanta, Italy
  • SubterraneaGrottenaquarium, Netherlands
  • SubterraneaGrottenbahn am Pöstlingberg, Austria
  • SubterraneaHöhlenburg Grottenstein, Switzerland
  • CaveThe Grotto, Australia
  • CaveThe Grotto, Northern Mariana Islands
  • SubterraneaGrotto Tavern, Malta
  • CaveGrouspa Cave, Greece
  • SubterraneaThe Grove Park Inn, United States of America
  • CaveGruebisbalm Höhle, Switzerland
  • SpringGründelsloch, Germany
  • MineVereinsbergwerk Grüner Zweig, Germany
  • MineErlebniswelt am Grünten, Germany
  • MineGruve 3, Norway
  • MineGruve 7, Norway
  • MineGruvkapellet, Sweden
  • SpringGrza, Serbia
  • SubterraneaGuacara Taina, Dominican Republic
  • ShowcaveCueva del Guácharo, Venezuela
  • CaveCueva de los Guácharos, Colombia
  • CaveCueva de los Guácharos del Rio Claro, Colombia
  • CaveCueva de los Guacharos, Perú
  • SubterraneaCatacumbas de Guadalajara, México
  • ShowcaveGuadirikiri Grot, Aruba
  • SubterraneaGuadix Cave Houses, Spain
  • CaveCueva de Guahedum, Spain
  • KarstGuajataca Forest, Puerto Rico
  • ShowcaveCueva de Gualicho, Argentina
  • ShowcaveGuanma Dong, China
  • ShowcaveJinzhou Guanyin Dong, China
  • ShowcaveGuanyindong, China
  • ShowcaveXixiu Guanyin Dong, China
  • ShowcaveYandang Guanyin Dong, China
  • KarstHaitón del Guarataro, Venezuela
  • CaveBarranco de Guayadeque, Spain
  • ShowcaveGuchaoyin Cave, China
  • MineMagic White Caves of Gudvangen, Norway
  • SubterraneaGrosser Atomschutz-Bunker in Güdingen, Germany
  • MineBergbaumuseum und Besucherbergwerk Grube Günnersdorf, Germany
  • MineMusée des Gueules Rouges, France
  • SubterraneaGuhantara, India
  • MineMiniera d’Oro della Guia, Italy
  • MineZwiedzanie Kopalni Guido, Poland
  • SubterraneaGuildhall Medieval Crypt, Great Britain
  • CaveGuimit Cave, The Philippines
  • CaveGuinogo-an Cave, The Philippines
  • CaveCueva de Guitarreros, Perú
  • ShowcaveCueva de las Güixas, Spain
  • ShowcaveGujo Limestone Cave, Japan
  • CaveGuler Ice Caves, United States of America
  • MineGunnadoo Gold Mine, Australia
  • ShowcaveGunns Plains Caves, Australia
  • CaveGunung Senyum Caves, Malaysia
  • SubterraneaHilfskrankenhaus Gunzenhausen, Germany
  • GorgeGuoliang Wall-Mounted Highway, China
  • ShowcaveGupteswor Mahadev Gufa, Nepal
  • ShowcaveGupteswar Gupha, India
  • ShowcaveGürcüoluk Mağarası, Turkey
  • SubterraneaGurugem Phuk, China
  • ShowcaveGußmannhöhle, Germany
  • MineGrube Gustav, Germany
  • ShowcaveGutenberger Höhle, Germany
  • CaveGutmana Ala, Latvia
  • SubterraneaGuyaju Caves, China
  • MineGwalia Gold Mine, Australia
  • MineGwangmyeongdonggul, South Korea
  • CaveGýgagjá, Iceland
  • MineGympie Gold Mining and Historical Museum, Australia
  • ShowcaveGyokusen-do, Japan
  • CaveGyurkó-lápai-barlang, Hungary
  • CaveHa Baroana, Lesotho
  • SubterraneaHabis Caves, Lebanon
  • SubterraneaGros Ouvrage A19 Hackenberg, France
  • SubterraneaHack Green Secret Nuclear Bunker, Great Britain
  • MineHadeland Bergverksmuseum, Norway
  • ShowcaveHadži-Prodanova Pecina, Serbia
  • MineHänigser Teerkuhlen, Germany
  • GorgeHaga Tingshus Jättegryta, Sweden
  • SubterraneaBunker Hagen, Germany
  • KarstHa Ha Tonka State Park, United States of America
  • MineHaig Colliery Mining Museum, Great Britain
  • SubterraneaHaikong Cave, China
  • MineHainault Gold Mine, Australia
  • MineHaizhou Mine, China
  • CaveHa Kome Cave Dwellings, Lesotho
  • CaveHakusan Shrine, Japan
  • GorgeHakusan Shrine, Japan
  • ShowcaveHakuun-do, Japan
  • MineMusée Minier et Métallurgique de Musson-Halanzy, Belgium
  • SubterraneaMithrasgrotte, Germany
  • MineBergbaumuseum Hall, Austria
  • SubterraneaHalliggye Fogou, Great Britain
  • MineHallstatt, Austria
  • SubterraneaĦal Saflieni Hypogeum, Malta
  • CaveHálsanefshellir Cave, Iceland
  • SubterraneaHamatoura Monastery, Lebanon
  • KarstHamilton Pool, United States of America
  • CaveHamilton’s Caves, Bahamas
  • ShowcaveGrotte Hamma, Algeria
  • ShowcaveCuevas de Hams, Spain
  • ShowcaveGrottes de Han-sur-Lesse, Belgium
  • ShowcaveHana Lava Tube, United States of America
  • SubterraneaHand and Heart, Great Britain
  • MineExpozícia uhoľného baníctva na Slovenku, Slovakia
  • CaveHang Ma, Vietnam
  • SubterraneaHanibe Caves, Japan
  • MineHannan’s North Tourist Mine - The Mining Hall Of Fame, Australia
  • SubterraneaHantongshan Shenxian Dong, China
  • CaveHanyama No. 2 Tunnel, Japan
  • CaveTa Spilia Harakas, Greece
  • CaveHaramiiska Dupka, Bulgaria
  • MineMusée de la Mine d’Harchies, Belgium
  • MineGrua va Hardömbl, Italy
  • SubterraneaHard Rock Vault, Great Britain
  • MineHard Tack Mine, United States of America
  • MineHard Times Mine, Australia
  • SubterraneaHaritun Cave, Israel
  • KarstSentier Karstique Gouffres d’Harizpé, France
  • CaveSpilia Harkadio - Harkadio Cave, Greece
  • ShowcaveHarmanecká Jaskyna, Slovakia
  • SubterraneaBunker Harnekop, Germany
  • MineMusée de l’Ecole et de la Mine, France
  • SpringHarod Spring, Israel
  • CaveGrotte d’Harpea, France
  • ShowcaveHarrie Wood Cave, Australia
  • ShowcaveHarrison’s Cave, Barbados
  • CaveHartford Cave, Bahamas
  • CaveHarman 1, Australia
  • SubterraneaHartness House, United States of America
  • CaveHarwood’s Hole, New Zealand
  • ShowcaveGħar Ħasan, Malta
  • ShowcaveHashidate shonyudo, Japan
  • MineHashima Mine, Japan
  • CaveHatchet Bay Cave, Bahamas
  • SubterraneaMusée de l’Abri de Hatten, France
  • CaveHatter’s Hideout Cave and Lodge, Australia
  • CaveHaua Fteah Cave, Libya
  • SubterraneaHaunted Cave, United States of America
  • SubterraneaHausertorstollen, Germany
  • SubterraneaLes Hautes Roches, France
  • MineArdoisière Haut-Martelange, Luxembourg
  • GorgeHavasu Falls, United States of America
  • SubterraneaHawkstone Park, Great Britain
  • SubterraneaMonastery of Our Lady of Hawqa, Lebanon
  • CaveShpella e Haxhi Aliut, Albania
  • SubterraneaHazan Caves, Israel
  • CaveHazrat Daud Cave, Uzbekistan
  • ShowcaveHeaven Cave, The Philippines
  • KarstSteinerne Rinne bei Hechlingen, Germany
  • MineBesucherbergwerk "Heilige Drei Könige", Germany
  • MineGoldgräberdorf Heiligenblut, Austria
  • MineHeilstollen Nordenau, Germany
  • CaveHeimensteinhöhle, Germany
  • ShowcaveHeimkehle, Germany
  • ShowcaveHeineman Winery - Crystal Cave, United States of America
  • ShowcaveHeinrichshöhle, Germany
  • MineHeinrich-Kocher-Stollen, Germany
  • GorgeHei Shan Gou, China
  • SubterraneaFestung Heldsberg, Switzerland
  • SubterraneaHelensburgh Glowworm Tunnel, Australia
  • SubterraneaZivilschutzbunker Helgoland, Germany
  • SubterraneaRestaurant l’Hélianthe, France
  • KarstHell Geological Site, Cayman Islands
  • SubterraneaCaves of Hella, Iceland
  • MineHella-Glück-Stollen, Germany
  • SubterraneaHellfire Corner, Great Britain
  • SubterraneaHellnahellir, Iceland
  • KarstHell’s Gate, Antigua & Barbuda
  • SubterraneaHelme Koopad, Estonia
  • GorgeHelvetinkolu, Finland
  • MineHelvetisches Goldmuseum, Switzerland
  • CaveHenneth Annûn, Middle-Earth
  • MineGalleria Henry, Italy
  • CaveHenry Morgan’s Cave, Bahamas
  • ShowcaveHerbstlabyrinth-Adventhöhle-System, Germany
  • ShowcaveGrottes d’Hercules, Morocco
  • SubterraneaCueva de Hércules, Spain
  • MineWerra-Kalibergbau-Museum Heringen, Germany
  • MineHeritage Gold Mine Park, United States of America
  • MineHerkimer Diamond Mines, United States of America
  • ShowcaveHermannshöhle, Germany
  • ShowcaveHermannshöhle, Austria
  • CaveHöhle auf dem Großen Hermannstein, Germany
  • CaveHermit’s Cave, Australia
  • ShowcaveGrutas los Herrara, México
  • MineSchiefergrube Herrenberg, Germany
  • SubterraneaHerts Young Mariners Base, Great Britain
  • SubterraneaHerzgruft, Austria
  • MineEisenbergwerk Herznach, Switzerland
  • CaveHezarmerd Cave, Iraq
  • SubterraneaHezekiah’s Tunnel, Israel
  • MineHibbing Taconite Tours, United States of America
  • CaveHickelhöhle, Germany
  • ShowcaveHida dai-shonyudo, Japan
  • ShowcaveHidden Cave, United States of America
  • CaveHidden Forest Cave, United States of America
  • ShowcaveHidden River Cave, United States of America
  • KarstHidden Worlds Cenotes, México
  • MineHidee Gold Mine, United States of America
  • SubterraneaHideout, Ukraine
  • KarstHierve el Agua, México
  • SubterraneaHilehvar Buried Village, Iran
  • MineHill Annex Mine, United States of America
  • MineHimalaya Tourmaline Mine, United States of America
  • MineHimmelfahrt Fundgrube, Germany
  • SubterraneaHimmelsbergstollen, Germany
  • MineHimmlisch Heer, Germany
  • ShowcaveHinagdanan Cave, The Philippines
  • ShowcaveHindang Cave and Wild Monkeys, The Philippines
  • MineHipasam Iron Mine, Argentina
  • ShowcaveCave of Hira, Saudi Arabia
  • KarstHiraodai Nature Observation Center, Japan
  • MineFischbach, Germany
  • SubterraneaMorski tunel Hitlerove oči, Croatia
  • ShowcaveHito-ana, Japan
  • GorgeHitonhauta, Finland
  • SpringVyvieračka Hlbokô, Slovakia
  • MineDůl Hlubina, Czech Republic
  • MineBanský Skanzen v Hnilčíku, Slovakia
  • ShowcaveĐộng Hoa Cương, Vietnam
  • CaveĐộng Hoa Tiên, Vietnam
  • SubterraneaHobbiton, New Zealand
  • MineSchaubergwerk Hochfeld, Austria
  • ShowcaveHochkarschacht, Austria
  • CaveHocking Hills State Park, United States of America
  • MineHodge Close, Great Britain
  • CaveHang Hồ Động Tiên, Vietnam
  • MineHodruša Hámre, Slovakia
  • SubterraneaAtlantikwall-Museum Hoek van Holland, Netherlands
  • GorgeHöllentalklamm, Germany
  • ShowcaveHölloch, Switzerland
  • KarstHöhlenkundliches Museum, Germany
  • MineSchaubergwerk Hofergraben, Austria
  • MineHoffnungsstollen Todtmoos, Germany
  • CaveHögberget Cave, Finland
  • SubterraneaHohenfels-Essinger Eishöhlen, Germany
  • MineMagnesitstollen Hohentauern, Austria
  • CaveHohlenstein, Germany
  • CaveHohlensteinhöhle, Austria
  • ShowcaveHohler Fels, Germany
  • CaveHohler Stein bei Schambach, Germany
  • CaveHohler Stein, Germany
  • SubterraneaHohllay, Luxembourg
  • CaveTham Hoi, Laos
  • SubterraneaHole N" The Rock, United States of America
  • CaveHole in the Rock, New Zealand
  • KarstHole-in-the-Wall, South Africa
  • SubterraneaHolkovsky Monastery, Russia
  • CaveHolkrans at Golden Gate, South Africa
  • CaveHolkrans at Meiringskloof, South Africa
  • CaveHollenkammer, Germany
  • SubterraneaHollombuwa Sthreepura Cave Temple, Sri Lanka
  • ShowcaveHoly Crystal Cave, The Philippines
  • SubterraneaSchloßberghöhlen, Germany
  • MineHomestake Mine, United States of America
  • CaveHomestead Crater, United States of America
  • SpringHomosassa Springs, United States of America
  • ShowcaveHoney Branch Cave, United States of America
  • CaveHoneycomb Cave, New Zealand
  • CaveHoneycomb Cave, Australia
  • SubterraneaHoni HaMe’agel, Israel
  • MineHonister Slate Mine, Great Britain
  • SubterraneaHonzrather Keller, Germany
  • MineHopemore Mine, United States of America
  • MineHopewell Colliery, Great Britain
  • ShowcaveHoq Cave, Yemen
  • KarstHorayama, Japan
  • GorgeHorma Kanyonu, Turkey
  • CaveHorne Lake Caves, Canada
  • MineHornkullens gruvor, Sweden
  • ShowcaveCueva de Hornos de la Peña, Spain
  • MineGrand Hornu, Belgium
  • GorgeHorseshoe Bend, United States of America
  • CaveHorvatove Stube, Croatia
  • ShowcaveHoshino-no ana, Japan
  • SubterraneaHotel Jalta Bunker Museum, Czech Republic
  • SubterraneaThe Secret Rooms of Hotel Jama, Slovenia
  • SubterraneaHotel Sassi Di Matera Diffuso, Italy
  • CavePeștera Hoților, Romania
  • ShowcaveGrottes des 1001 Nuits, Belgium
  • KarstHou’er Sinkhole, China
  • SubterraneaLa Hougue Bie, Great Britain
  • GorgeGorge de Hourat, France
  • SubterraneaHouse on Fire, United States of America
  • CaveHouse of Rock, Samoa
  • SubterraneaDowntown Houston Tunnel System, United States of America
  • MineMonkey Mine Museum, China
  • ShowcaveHoverbergsgrottan, Sweden
  • CaveHöversbygrottan, Sweden
  • SpringHoward Springs, Australia
  • ShowcaveHowe Caverns, United States of America
  • GorgeHow Stean Gorge, Great Britain
  • ShowcaveHoyop-Hoyopan Cave, The Philippines
  • CaveHoyo Soplador, Colombia
  • SubterraneaHrad Houska, Czech Republic
  • KarstHranická propast, Czech Republic
  • GorgeHrazdan Gorge, Armenia
  • CaveHrustovačka pećina, Bosnia and Herzegovina
  • ShowcaveHtan San Cave, Myanmar
  • CaveGruta de Huagapo, Perú
  • MineHuaibei National Mine Park, China
  • GorgeHuangchuan Three Gorges, China
  • CaveHuangdi Dong - Emperor’s Cave, China
  • ShowcaveHuangjin Dong (Tangya River), China
  • ShowcaveHuanglong Dong, China
  • KarstHuanglong, China
  • ShowcaveHuánglóng dòng, China
  • MineHuangshi National Mine Park, China
  • ShowcaveHuangxiandong, China
  • ShowcaveHuangzhu Dong, China
  • SubterraneaHuashan Quarries, China
  • SubterraneaHuayan Temple, China
  • ShowcaveHuayangdong, China
  • ShowcaveHuayang Cave, China
  • CaveHubbard’s Cave, United States of America
  • SubterraneaHubertuskapelle, Germany
  • CavePeştera Huda lui Papară, Romania
  • CaveHuda Luknja, Slovenia
  • MineBesucherbergwerk Grube "Hühn", Germany
  • CaveHülbener Tropfsteinhöhle, Germany
  • CaveHuelgoat, France
  • ShowcaveCueva Huerta, Spain
  • MineSchaubergwerk Hüttenberg, Austria
  • KarstHufangalupe, Tonga
  • KarstHugh’s Dale Waterfall, Australia
  • ShowcaveGrotte des Huguenots, France
  • ShowcaveHuliba Grot, Aruba
  • SubterraneaHuligemmana Kolla, India
  • SubterraneaHulimev Cave Temple, India
  • MineHull Rust Mine, United States of America
  • Showcave’Ana Hulu, Tonga
  • KarstSima Humboldt, Venezuela
  • SubterraneaHumphrey Kynaston’s Cave, Great Britain
  • ShowcaveHundalm Eis- und Tropfsteinhöhle, Austria
  • CaveCueva del Hundidero, Spain
  • CaveHundraðmannahellir, Iceland
  • KarstHungerbrunnen, Germany
  • ShowcaveDong Huong Tich, Vietnam
  • KarstTham Hup Pa Tat, Thailand
  • SubterraneaDělostřelecká Tvrz Hůrka, Czech Republic
  • ShowcaveHurricane River Cave, United States of America
  • MineMines de Hussigny-Godbrange, France
  • SubterraneaHusitské muzeum, Czech Republic
  • SubterraneaHuto and Kamarband Cave, Iran
  • KarstSources de l’Huveaune, France
  • ShowcaveHwaam Gul, South Korea
  • MineHwalok Cave, South Korea
  • ShowcaveHwanggeum Dong, China
  • ShowcaveHwanseon Gul, South Korea
  • ShowcaveHyeopjae Gul - Ssangyong Gul, South Korea
  • ShowcaveIagodinska Peštera, Bulgaria
  • ShowcavePeştera Ialomita, Romania
  • CaveIazoni Cave, Georgia
  • MineBergbaumuseum Ibbenbüren, Germany
  • ShowcaveIberger Tropfsteinhöhle, Germany
  • ShowcaveIce Cave and Bandera Volcano, United States of America
  • SubterraneaIce Age Glacial Exhibit, United States of America
  • SpringIchetucknee Spring, United States of America
  • CaveGħar Id-Duhhan, Malta
  • CaveIdagrotte, Germany
  • ShowcaveIdaho’s Mammoth Cave, United States of America
  • CaveIdaion Antron, Greece
  • MineIda Shaft Headframe, Japan
  • SpringIdikundu, Sri Lanka
  • SubterraneaInstituto Geológico y Minero Español, Spain
  • CaveIgnateva Pestera, Russia
  • CaveGruta da Igrejinha, Brazil
  • CaveIho-Eleru, Nigeria
  • KarstCenote Ik Kil, México
  • MineIkuno Silver Mine, Japan
  • ShowcaveIkura-do, Japan
  • SubterraneaGħar il-Kbir, Malta
  • Subterraneail-Barri Restaurant, Malta
  • SubterraneaLe Cisterne ed il Palombaro dell’Hotel Il Belvedere, Italy
  • SubterraneaBunker Ilbenstadt, Germany
  • CaveIlgarini Mağarası, Turkey
  • KarstIl-Hofra tal-Mellieha, Malta
  • ShowcaveSpilia Illithias - Cave of Ilithias, Greece
  • CaveLa Grotte (Illetas Club Playa), Spain
  • CaveIllinois Caverns, United States of America
  • KarstIl-Maqluba, Malta
  • CaveIlsenhöhle, Germany
  • MineLa Mine Image, France
  • KarstImi n’Ifri, Morocco
  • ShowcaveImperial Cave, Australia
  • MineBergbauerlebniswelt Imsbach, Germany
  • Showcaveİnatlı Mağarası, Turkey
  • CaveInanke Cave, Zimbabwe
  • ShowcaveInazumi suichu shonyudo, Japan
  • KarstPuente del Inca, Argentina
  • ShowcaveInca Cueva, Argentina
  • Subterraneaİnceğiz Mağaraları, Turkey
  • ShowcaveIncirli Cave, Cyprus
  • Showcaveİncirliin Mağarası, Turkey
  • MineIndependence Mine, United States of America
  • SubterraneaMuseum of Independence, Bangladesh
  • CaveGruta India, Argentina
  • ShowcaveIndian Caverns, United States of America
  • SubterraneaIndian Cave, Antigua & Barbuda
  • ShowcaveIndiana Caverns, United States of America
  • SubterraneaIndianapolis City Market Catacombs, United States of America
  • ShowcaveIndian Echo Caverns, United States of America
  • CaveIndian Cave State Park, United States of America
  • ShowcaveIndian Trail Caverns, United States of America
  • ShowcaveIndian Cave Village, United States of America
  • ShowcaveCuevas del Indio, Cuba
  • ShowcaveCueva del Indio, Puerto Rico
  • CaveBoca do Inferno, Portugal
  • CaveCueva del Infierno, Puerto Rico
  • Subterranea3rd Infiltration Tunnel, South Korea
  • Subterranea4th Infiltration Tunnel, South Korea
  • Subterranea2nd Infiltration Tunnel, South Korea
  • ShowcaveIngleborough Cave, Great Britain
  • SubterraneaInjun Joe’s Cave, United States of America
  • CaveInkerman Cave Monastery, Russia
  • CaveQaura - Inland Sea, Malta
  • ShowcaveInner Space Cavern, United States of America
  • SubterraneaInnocent Railway Tunnel, Great Britain
  • CaveInscrições Rupestres, Brazil
  • SubterraneaInstitutul de Speologie "Emil Racoviţă", Romania
  • ShowcaveInsuyu Mağarasın, Turkey
  • SpringIntermittent Spring, United States of America
  • SubterraneaInterstate Caves, United States of America
  • KarstLimni Ioanninon - Lake Pamvotis, Greece
  • ShowcaveIoki Cave, Japan
  • ShowcavePoarta Lui Johele, Romania
  • CaveIpapanti Monastery, Greece
  • CaveIpswich Caves, Jamaica
  • ShowcaveIrimizu shonyudo, Japan
  • CaveIriyuji-Gama Cave, Japan
  • MineIronbridge Gorge Museum, Great Britain
  • MineIron Mountain Iron Mine, United States of America
  • ShowcaveIshigaki Do, Japan
  • ShowcaveGrotte Is Janas, Italy
  • ShowcaveVoragine di Ispinigoli, Italy
  • CaveIstállós-kői-barlang, Hungary
  • SubterraneaIsteiner Klotz, Germany
  • ShowcaveLes Grottes Isturitz et Oxocelhaya, France
  • SpringPeştera Isverna, Romania
  • ShowcaveGrotte Is Zuddas, Italy
  • GorgeCânion Itaimbezinho, Brazil
  • SubterraneaItäkeskuksen Uimahalli, Finland
  • CaveIttin Cave, Oman
  • SubterraneaIvanovo Rock Churches, Bulgaria
  • MineIwami Ginzan, Japan
  • SubterraneaIwamuro Kannon, Japan
  • ShowcaveIwaya shōnyūdō, Japan
  • SubterraneaIwaya Kannon Cave, Japan
  • CaveIwaya Kannon, Japan
  • SubterraneaIwayayama Cave, Japan
  • SpringPeștera Izbândiș, Romania
  • SubterraneaIzumizaki Cave Tomb, Japan
  • ShowcaveIzuru shonyudo, Japan
  • CaveJaana Dragon Cave, Japan
  • CaveJacks Blowhole, New Zealand
  • SpringJacob’s Well, United States of America
  • ShowcaveJacob’s Cave, United States of America
  • MineJagersfontein Mine, South Africa
  • CaveJameos del Agua, Spain
  • KarstJames Bond Rock, Thailand
  • MineŠtola Jana Evangelisty, Czech Republic
  • CaveJaneh Cave, Japan
  • ShowcaveCaverna Janelão, Brazil
  • CaveJankovich-barlang, Hungary
  • GorgeJánošíkove diery, Slovakia
  • KarstCenote Jardin del Eden, México
  • CaveJarnan Cave, Oman
  • SubterraneaPodziemia Jarosławskie, Poland
  • CaveJasana Cave, Iraq
  • CaveJaskinia Jasna koło Smolenia, Poland
  • ShowcaveJasovska Jaskyna, Slovakia
  • MineJasujeong, South Korea
  • ShowcaveGoa Jatijajar, Indonesia
  • SubterraneaGrottes troglodytes de la Jaubernie, France
  • ShowcaveJavoříčské jeskyně, Czech Republic
  • MineMina de la Jayona, Spain
  • MineMusée de la mine Jean-Marie Somet, France
  • CaveJeffrey’s Hole, Bermuda
  • ShowcaveMagharet Jeita, Lebanon
  • MineMina do Jeje, Brazil
  • CaveJelovačka Pećina, Montenegro
  • SpringJelovičko vrelo, Serbia
  • KarstJemez Soda Dam, United States of America
  • ShowcaveJeongbang Waterfall, South Korea
  • SubterraneaGoa Jepang Klungkung, Indonesia
  • ShowcaveGrottes du Pic du Jer, France
  • ShowcaveJersey Cave, Australia
  • SubterraneaYe Olde Trip to Jerusalem, Great Britain
  • CaveGruta dos Jesuítas, Brazil
  • SubterraneaLa Cueva del tío Jesús, Spain
  • ShowcaveJewel Cave, United States of America
  • ShowcaveMargaret River Caves - Jewel Cave, Australia
  • SubterraneaJezuïetenberg, Netherlands
  • KarstJiangzhou Natural Bridge, China
  • ShowcaveJiguandong, China
  • SubterraneaJihlavské podzemí, Czech Republic
  • ShowcaveJillabenan Cave, Australia
  • SubterraneaJindeng Temple, China
  • ShowcaveJing Dong Da Rong Dong, China
  • CaveJingemia Cave, Australia
  • MineJinhuagong National Mine Park, China
  • ShowcaveJin Shi Dong, China
  • ShowcaveJinshuiyan, China
  • ShowcaveJiulongdong, China
  • ShowcaveJiutian Dong, China
  • ShowcaveYiyuan Jiutian Cave, China
  • ShowcaveJiuxiang Dong, China
  • ShowcaveJiuxiao Biyundong, China
  • ShowcaveJizhou Dong, China
  • CaveJobitzinaj Cave, Guatemala
  • MineŠtola Johannes, Czech Republic
  • CaveGrottan Johannes Kammare, Sweden
  • GorgeJohannesbachklamm, Austria
  • KarstJohannisfelsen, Germany
  • CaveGoa Jomblang, Indonesia
  • ShowcaveJomon shonyudo, Japan
  • SubterraneaGrottes de Jonas, France
  • CaveJons Kapel, Denmark
  • SubterraneaJordan Creek Underground Tours, United States of America
  • SubterraneaJorf Khettaras, Morocco
  • SubterraneaJosefov Podzemi, Czech Republic
  • SubterraneaJosef Stalin’s Underground Printing House Museum, Georgia
  • MineMusée de la Mine à Joseph-Else, France
  • SubterraneaLes Journées de la Rose, France
  • CaveCueva Juan Nieves, Puerto Rico
  • ShowcaveJubilee Cave, Australia
  • SubterraneaInternationales Fledermaus-Museum Julianenhof, Germany
  • ShowcaveAssembly Dragon Cave, China
  • ShowcaveCavernas de Jumandi, Ecuador
  • ShowcaveJunction Cave, Australia
  • SubterraneaJungang Underground Shopping Center, South Korea
  • CaveJungfernhöhle, Germany
  • SpringJuniper Springs, United States of America
  • MineJunkundar Coal Mine, India
  • SubterraneaJurnet’s Bar, Great Britain
  • ShowcaveGrutas de Juxtlahuaca, México
  • KarstJvari Pass Travertine, Georgia
  • CaveKaaiman’s Grotto, South Africa
  • KarstLaguna de Kaan Luum, México
  • CaveKaaterskill Falls, United States of America
  • CaveKachargadh Caves, India
  • SpringTermálny Prameň Kaďa, Slovakia
  • ShowcaveMagharet Qadisha, Lebanon
  • SubterraneaCave Church Kadjenica, Serbia
  • ShowcaveJaskinie na Kadzielni, Poland
  • KarstKælderhalsen, Denmark
  • MineBergbaumuseum und Besucherbergwerk Käpfnach, Switzerland
  • MineEesti Kaevandusmuusem, Estonia
  • CaveKaew Cave, Thailand
  • ShowcaveTham Kaew Komol, Thailand
  • MineKåfjord Kopperverk, Norway
  • ShowcaveKagekiyo-do, Japan
  • KarstKaghu Waterfall, Georgia
  • CaveKahlensteinhöhle, Germany
  • SubterraneaFormer Japanese Navy Underground Headquarters, Japan
  • ShowcaveKailash Gufa, India
  • ShowcaveKain Hitam - The Painted Cave, Malaysia
  • GorgeKaiserklamm, Austria
  • SubterraneaKaiserliche Schatzkammer, Austria
  • CaveKaiser-Max-Grotte, Austria
  • SubterraneaUnterirdische Gänge Kaiserslautern, Germany
  • SubterraneaFeste Kaiser Wilhelm II, France
  • CaveAna Kai Tangata, Chile
  • ShowcaveKaiyuan Cave, China
  • CaveAna Kakenga, Chile
  • ShowcaveKaklik Mağarası, Turkey
  • CaveKakoperato Cave, Greece
  • GorgeGorges de Kakuetta, France
  • CaveKakushöhle, Germany
  • ShowcaveKalabera Cave, Northern Mariana Islands
  • CaveCrkva „Sv. Bogorodica“ Kališta, North Macedonia
  • CaveGoa Kalisuci, Indonesia
  • CaveKalkstensgrottor, Sweden
  • SubterraneaAusweichsitz Nordrhein-Westfalen, Germany
  • CaveKalladanthy Natural Cave, India
  • CaveHohler Stein, Germany
  • SubterraneaMonastery Kaloritsa, Greece
  • SubterraneaEmmi Cheese Cave Kaltbach, Switzerland
  • KarstKarstlehrpfad Kaltbrunnental-Brislachallmet, Switzerland
  • GorgeKamarai Gorge, Greece
  • CaveSpilaio Kamares - Cave Kamaron - Kamares Cave, Greece
  • CaveCaverna Kambá Hópo, Paraguay
  • KarstKameiwa Cave, Japan
  • GorgeKamenice Hřensko, Czech Republic
  • GorgeKamieńczyk Gorge, Poland
  • CaveKammerbacher Höhle, Germany
  • MineHaus des Bergmanns, Germany
  • MineBesucherbergwerk Kamsdorf, Germany
  • SubterraneaCizinecký vstup do kanalizace, Czech Republic
  • CaveKana Raja’s Cave, Bangladesh
  • GorgeKanarra Creek Gorge, United States of America
  • ShowcaveKanba-no Oni-no ana, Japan
  • CaveLas Cuevas de K’an Ba, Guatemala
  • SubterraneaKandovan, Iran
  • CaveKaneana Cave, United States of America
  • MineKanehon Quarry, Japan
  • SubterraneaKanheri Caves, India
  • CaveKaniwhaniwha Caves, New Zealand
  • KarstCenote Kankirixche, México
  • KarstKanlıdivane, Turkey
  • SubterraneaKanmon Kaikyo Tunnel, Japan
  • SubterraneaGrotten Van Kanne, Belgium
  • SubterraneaKannon Dokutsu, Japan
  • MineKanowna Belle Goldmines, Australia
  • MineKansas Underground Salt Museum, United States of America
  • SubterraneaKantakuzen’s Catacomb, Ukraine
  • CaveMogharet el Kantara, Egypt
  • ShowcaveKantun Chi Caves, México
  • CaveKanze Limestone Cave, Japan
  • ShowcaveTham Kao Rao, Laos
  • SubterraneaBunker am Kap Arkona, Germany
  • SubterraneaKapilikaya Rock Tomb, Turkey
  • CaveKap-Kutan Cave, Turkmenistan
  • CaveKåppasjåkkagrottorna, Sweden
  • ShowcaveKapsia Cave, Greece
  • MineKaptensspelet, Sweden
  • SubterraneaKapucínská krypta, Czech Republic
  • SubterraneaKapuzinergruft, Austria
  • ShowcaveKaraca Mağarası, Turkey
  • SubterraneaKaraftu Cave, Iran
  • ShowcaveKarain Mağarası, Turkey
  • ShowcaveKaraulnaya Cave, Russia
  • SubterraneaKaravanserai Bakery, Georgia
  • SpringKaravomilos Lake, Greece
  • SubterraneaKarla Caves, India
  • CaveKarlamanska Cave, Russia
  • SubterraneaKarl-May-Höhle, Germany
  • ShowcaveKarlyuk Caves, Turkmenistan
  • CaveGrotta della Gavetta e Grotta del Pilone, Italy
  • ShowcaveGrutas Karmidas, México
  • CaveGħar ta’ Karolina, Malta
  • KarstKarstkundlicher Wanderweg Laichingen, Germany
  • ShowcaveKartchner Caverns State Park, United States of America
  • KarstKarvės Ola, Lithuania
  • SubterraneaBrasserie Kazematten, Belgium
  • ShowcaveKastania Cave, Greece
  • CaveSpilaio Kastritza - Kastritsa Cave, Greece
  • ShowcaveKatafiki Cave, Greece
  • CaveSpilia Katafygi, Greece
  • ShowcaveGhar Katalehkhor, Iran
  • CaveKåtavikens grottstig, Sweden
  • KarstKatavothres, Greece
  • ShowcaveKaterinska jeskyne, Czech Republic
  • ShowcaveKaterloch, Austria
  • SubterraneaKatflaap Catacombs, Molvanîa
  • MineKathu Mining Museum, Thailand
  • CaveKatla Ice Cave, Iceland
  • SubterraneaTombs of the Kings, Cyprus
  • CaveKatouche Cave, Anguilla
  • SubterraneaKatpatuka Cave Hotel, Turkey
  • CaveKaumana Cave, United States of America
  • SubterraneaKaunos Kral Mezarları, Turkey
  • CaveKaupo Ala, Latvia
  • GorgeCuevas de Kavac, Venezuela
  • ShowcaveKawachi Fuketsu, Japan
  • ShowcaveKaw Gon Cave, Myanmar
  • ShowcaveKawiti Glowworm Caves, New Zealand
  • ShowcaveKaw Ka Thaung Cave, Myanmar
  • SubterraneaKayadem Cave Hotel, Turkey
  • MineMusée National des Mines, Luxembourg
  • SubterraneaKaymaklý Yeraltı Şehri, Turkey
  • SubterraneaKazanluk Tomb, Bulgaria
  • SubterraneaBrouwerij De Kazematten, Belgium
  • CaveKazumura Cave, United States of America
  • SpringKeerimalai Sacred Water Spring, Sri Lanka
  • CaveTrypas Kefalas - Cave of Kefala, Greece
  • SpringKefalari, Greece
  • SpringKefalari Spring, Greece
  • ShowcaveGua Kelam, Malaysia
  • ShowcaveGua Kelam 2, Malaysia
  • ShowcaveGua Kelawar, Malaysia
  • SubterraneaKelebek Hotel, Turkey
  • MineKelly Mine, Great Britain
  • ShowcaveKelly Hill Caves, Australia
  • ShowcaveKeloğlan Mağarası, Turkey
  • SubterraneaCave of Kelpius, United States of America
  • SubterraneaKelvedon Hatch Secret Nuclear Bunker, Great Britain
  • SubterraneaCommand Bunker Kemmel, Belgium
  • MineKennecott Mine, United States of America
  • MineKennedy Mine, United States of America
  • ShowcaveKents Cavern, Great Britain
  • ShowcaveKentucky Caverns, United States of America
  • MineKentucky Coal Mining Museum, United States of America
  • CaveCaves of Keshcorran, Ireland
  • KarstRainbow Cave, Israel
  • GorgeKesselfallklamm, Austria
  • SubterraneaKessler Kellerführungen, Germany
  • CaveKesslerloch, Switzerland
  • MineKeswick Mining Museum, Great Britain
  • SpringKeterisi Mineral Vaucluse, Georgia
  • ShowcaveMagharet Kfar Him, Lebanon
  • CaveKhadr Afrar Cave, Oman
  • GorgeKhadzhokhskaya tesnina, Russia
  • SubterraneaKhambhalida Buddhist Caves, India
  • ShowcaveTham Khamin, Thailand
  • SubterraneaKhandagiri Cave, India
  • SubterraneaCaves of Khandepar, India
  • CaveKhangkhui Mangsor, India
  • ShowcaveTham Bin Cave, Thailand
  • ShowcaveKhao Chang Hai Cave, Thailand
  • CaveKhao Chang Lon Cave, Thailand
  • CaveTham Khao Khun Krathing, Thailand
  • ShowcaveTham Khao Kop, Thailand
  • CaveTham Khao Kriep Ngoen, Thailand
  • CaveWat Tham Khao Kuha, Thailand
  • ShowcaveTham Khao Luang, Thailand
  • CaveTham Khao Mai Khew, Thailand
  • SubterraneaKhao Nam Khang Historical Tunnel, Thailand
  • CaveTham Khao Ngoen, Thailand
  • ShowcaveTham Khao No, Thailand
  • CaveKhao Rup Chang Cave Temple, Thailand
  • ShowcaveKhao Tham Phra, Thailand
  • SubterraneaKhapra Kodiya Caves, India
  • SubterraneaKhareba Winery, Georgia
  • ShowcaveKhayon Cave, Myanmar
  • MineKhewra Salt Mines, Pakistan
  • ShowcaveTham Khlang, Thailand
  • SubterraneaCaves of Khnatsakh, Armenia
  • SubterraneaKh’ndzoresk, Armenia
  • CaveGrutas do Khodzue, Mozambique
  • CaveKhomuli Cave, Georgia
  • SubterraneaWat Khuha Phimuk, Thailand
  • CaveTham Khuha Sawan, Thailand
  • CaveKickapoo Cavern State Park, United States of America
  • ShowcaveKickapoo Indian Caverns, United States of America
  • SubterraneaMuuseum Kiek in de Kök, Estonia
  • SubterraneaKiev Pechersk Lavra, Ukraine
  • CaveKigan Yusenkyo, Japan
  • CaveKiik-Koba, Russia
  • CaveKiinen Gongen, Japan
  • SubterraneaWiderstandsnest 67 HL, Netherlands
  • MineBesucherbergwerk Kilianstollen, Germany
  • MineKillhope Lead Mining Museum, Great Britain
  • ShowcaveKilling Caves, Cambodia
  • MineKimberley Mine - Big Hole, South Africa
  • MineKimberley Underground Mining Railway, Canada
  • ShowcaveĐộng Kim Quy, Vietnam
  • ShowcaveKin-nisshu-do, Japan
  • SubterraneaAir Defense Operations Center Kindsbach, Germany
  • CaveKing’s Cave, Great Britain
  • MineKing Arthur’s Labyrinth, Great Britain
  • CaveKing Arthur’s Cave, Great Britain
  • MineKing Edward Mine, Great Britain
  • CaveKing George V Cave, Australia
  • ShowcaveKönig-Otto-Tropfsteinhöhle, Germany
  • ShowcaveKing Solomon Cave, Australia
  • MineKing Solomon’s Mines, Israel
  • ShowcaveGold Cave Café and Bonsai Garden, Japan
  • SubterraneaKinver Edge Rock Houses, Great Britain
  • SubterraneaKipina Monastery, Greece
  • KarstKirkilai Lakes and Observation Tower, Lithuania
  • SpringKırmızı Su, Turkey
  • GorgeKirnitzschklamm, Germany
  • MineLKAB Visitor Centre, Sweden
  • SubterraneaKish Underground City, Iran
  • ShowcaveGoa Kiskendo Jatimulyo, Indonesia
  • ShowcaveGoa Kiskendo Trayu, Indonesia
  • SpringKitch-iti-kipi, United States of America
  • ShowcaveKitley Show Cave, Great Britain
  • ShowcaveKittelsthaler Tropfsteinhöhle, Germany
  • MineHistorisches Schmucksteinbergwerk "Kittenrain", Germany
  • CaveKitum Cave, Kenya
  • GorgeKitzlochklamm, Austria
  • CaveKiwengwa Caves, Tanzania
  • CaveKiyomigaoka Limestone Cave, Japan
  • GorgeKiyotsu-kyō, Japan
  • SubterraneaKizil Caves, China
  • MineKlackbergs Gruvfält, Sweden
  • SpringKläfferquelle, Austria
  • CaveKlæmintsgjógv, Faroe Islands
  • SubterraneaBergbaumuseum Klagenfurt, Austria
  • GorgeKláštorská Roklina, Slovakia
  • SubterraneaKlatovské katakomby, Czech Republic
  • SubterraneaKlausenhöhle, Germany
  • SubterraneaKleine Berlin, Italy
  • MineBesucherbergwerk Kleinenbremen, Germany
  • MineBergbaumuseum "Kleiner Johannes", Germany
  • SubterraneaGletschergrotte Klein Matterhorn, Switzerland
  • CaveKleinsteinhöhle, Germany
  • MineKopalnia Uranu Kletno, Poland
  • MineKleva gruva, Sweden
  • CaveKlobasja Jama, Slovenia
  • MineKlodawa Salt Mine, Poland
  • SubterraneaPodziemna Trasa Turystyczna 1000-Lecia Panstwa Polskiego w Klodzku, Poland
  • SubterraneaTwierdza Klodzka, Poland
  • CaveKlösterl, Germany
  • MineKlosterstollen Barsinghausen, Germany
  • SubterraneaKlusfelsen, Germany
  • ShowcaveKluterthöhle, Germany
  • MineKnaben Gruvemuseum, Norway
  • CaveKnadel Cave Tour, Morocco
  • MineKnalla gruvmuseum, Sweden
  • MineLausitzer Bergbaumuseum Knappenrode, Germany
  • MineSchachtanlage Knesebeck, Germany
  • MineKnife River Coal Mine & Bucket Site, United States of America
  • SubterraneaKőbányai pincerendszer, Hungary
  • ShowcaveKristallhöhle Kobelwald, Switzerland
  • CaveLegaga la ga Kobokwe, Botswana
  • ShowcaveKoboriya shonyudo, Japan
  • CaveKocaín Mağarası, Turkey
  • MineBesucherbergwerk in Bad Friedrichshall-Kochendorf, Germany
  • SpringKocherursprung, Germany
  • SubterraneaZivilschutzbunker Köln-Kalk, Germany
  • MineKalkbergwerk am Königsberg, Germany
  • MineGrube Marie in der Kohlbach, Germany
  • CaveKohlerhöhle, Austria
  • MineKohtla-Järve Põlevkivimuuseum, Estonia
  • CaveKojima Kurago, Japan
  • SubterraneaKokopelli’s Cave, United States of America
  • MineKolar Gold Fields, India
  • ShowcaveKolbinger Höhle, Germany
  • CaveKolowrathhöhle, Austria
  • ShowcaveKomakado Fuketsu, Japan
  • GorgeKomati Gorge, South Africa
  • SubterraneaKom es-Shouqafa, Egypt
  • ShowcaveKomori kutsu, Japan
  • ShowcaveKompong Trach Cave, Cambodia
  • SubterraneaKondhane Buddhist Caves, India
  • ShowcaveKonĕpruské jeskyně, Czech Republic
  • ShowcaveTham Kong Lor, Laos
  • MineNorsk Bergverksmuseum Kongsberg, Norway
  • ShowcaveKongshan Cave, China
  • ShowcaveKongshan Baiyun Cave, China
  • CaveKonispol Cave, Albania
  • MineKonnerud Gruver, Norway
  • MineSchacht Konrad, Germany
  • MineKonungastollen, Sweden
  • ShowcaveKooringa Cave, Australia
  • ShowcaveNatural Cave Koovapara, India
  • MinePodziemne Muzeum "Kopalnia Zlota" w Zlotym Stoku, Poland
  • MineStora Kopparberget, Sweden
  • MineKoppartorp, Sweden
  • ShowcaveKoppenbrüllerhöhle, Austria
  • KarstKamara tou Koraka Natural Bridge, Cyprus
  • CaveKorallgrottan, Sweden
  • CaveKorkia-Mauran Jääluola, Finland
  • MineKorkinsk Coal Mine, Russia
  • KarstFontana s Kornjačama, Croatia
  • SubterraneaMuseum "Rock" Korosten, Ukraine
  • CaveKorsanini Mağarası, Turkey
  • CaveKorykio Andro - Corycian Cave, Greece
  • ShowcaveKöşekbükü Mağarası, Turkey
  • MineSlovenské Technické Múzeum, Slovakia
  • ShowcaveKostanjevica Jama, Slovenia
  • CaveJeskyně Kostelík, Czech Republic
  • SubterraneaKottukal Cave Temple, India
  • ShowcaveKounoubwa Cave, Haiti
  • GorgeKourtaliotiko Gorge, Greece
  • ShowcaveSpilia Koutouki - Koutouki Cave, Greece
  • SubterraneaKoutsogiannopoulos Wine Museum, Greece
  • KarstKovači, Bosnia and Herzegovina
  • MineHistorický důl Kovárna, Czech Republic
  • MineSkansen Górnictwa Kowarskiego, Poland
  • MineSztolnie Kowary, Poland
  • ShowcaveKow Ata Underground Lake, Turkmenistan
  • CavePeshtera Kozarnika, Bulgaria
  • GorgeSlap Kozjak, Slovenia
  • SubterraneaWat Tham Krabok, Thailand
  • SubterraneaU Krále Brabantského, Czech Republic
  • CaveKraljičina Špilja, Croatia
  • CaveKrálova jeskynĕ, Czech Republic
  • SubterraneaVinárna U Královny Elišky, Czech Republic
  • SubterraneaRovi pod starim Kranjem, Slovenia
  • ShowcaveKrapina Cave, Croatia
  • CaveTham Krasae, Thailand
  • CaveTham Krasaeng, Thailand
  • ShowcaveKrasnaja pestera, Russia
  • CaveKrasnohorska Jaskyna, Slovakia
  • SpringKrasny Klutch Spring, Russia
  • ShowcaveKraushöhle, Austria
  • CaveKreidelucke, Austria
  • CaveGoa Kreo, Indonesia
  • KarstKarstlehrpfad Krippenstein, Austria
  • MineKristallgänge, Germany
  • ShowcaveKristalnaja pestera, Ukraine
  • GorgeKristal Teras, Turkey
  • MineKristinebergs gruva, Sweden
  • ShowcaveKrizna Jama, Slovenia
  • KarstNacionalni park Krka, Croatia
  • SpringKrka Spring, Croatia
  • MineKromdraai Gold Mine, South Africa
  • CaveKrompirjeva Jama, Slovenia
  • SubterraneaKronborg Slot, Denmark
  • CaveCastello di Mezzocorona, Italy
  • SubterraneaHöhlenburg Kropfenstein, Switzerland
  • MineGraphitbergwerk Kropfmühl, Germany
  • CaveJaskinia Krowia, Poland
  • ShowcaveKrška jama - izvir Krke, Slovenia
  • SpringKrupajsko Vrelo, Serbia
  • SpringIzvir Krupe, Slovenia
  • KarstKrushuna, Bulgaria
  • SubterraneaPotkop Krušica, Croatia
  • SubterraneaKryt 10 - Z, Czech Republic
  • SubterraneaKryt Denis, Czech Republic
  • MinePrahistoryczne Kopalnie Krzemienia w Krzemionkach, Poland
  • KarstKuang Si Falls, Laos
  • ShowcaveKubacher Kristallhöhle, Germany
  • SubterraneaKuda Mandad Caves, India
  • SpringKuhfluchtwasserfälle, Germany
  • CaveFiery Caves of Kuhi-Malik, Tajikistan
  • CaveKuhstall, Germany
  • CaveKula Kai Caverns, United States of America
  • CaveKullaberg Grottor, Sweden
  • SubterraneaEshab-ı Kehf Kulliye, Turkey
  • SubterraneaKulturbunker Barbarastollen, Germany
  • Cave’Ana Kuma, Tonga
  • CaveManza Onsen Kumashiro Cave, Japan
  • ShowcaveKumaso ana, Japan
  • CaveKumaya Cave, Japan
  • ShowcaveKumganggul, South Korea
  • CaveKuna Cave, United States of America
  • GorgeKundler Klamm, Austria
  • CaveKundum Cave, Bangladesh
  • ShowcaveKungur ledenica pestera, Russia
  • SubterraneaKunming Natural History Museum of Zoology, China
  • SubterraneaHistorischer Kunstbunker, Germany
  • SpringIzvor Kupe, Croatia
  • SubterraneaKupferberg Museum, Germany
  • MineBergbau-Museum Kupferberg, Germany
  • MineSchaubergwerk Kupferplatte, Austria
  • SubterraneaKuragala Cave Temple, Sri Lanka
  • ShowcaveKurasawa Shonyudo, Japan
  • SubterraneaKurjey Lhakhang, Bhutan
  • GorgeKurobe Gorge, Japan
  • CaveKutawato Cave, The Philippines
  • MineHrádek a důl Osel Kutná Hora, Czech Republic
  • ShowcaveKutumsar Gufa, India
  • ShowcaveKuumbi Cave, Tanzania
  • ShowcaveKuza Cave, Tanzania
  • CaveKverkfjöll, Iceland
  • CaveKvernufoss, Iceland
  • SubterraneaKyat Khayon Cave Monastery, Myanmar
  • ShowcaveKyrk Gyz Cave, Turkmenistan
  • ShowcaveKyusen-do, Japan
  • CaveKyzyl-Yar Cave, Russia
  • ShowcaveLaas Gaal, Somalia
  • CaveLa’auolola Caves, Samoa
  • CaveGrotta di Labante, Italy
  • ShowcaveGrotte de Labastide, France
  • CaveGruta La Batata, Cuba
  • ShowcaveGrotte de Labeil, France
  • SubterraneaBudavári Labirinthus, Hungary
  • SubterraneaLabirinto di Roma, Italy
  • SubterraneaLabirinto Casilino, Italy
  • SubterraneaLabirinto di Porsenna, Italy
  • ShowcaveRiv. Souterraine de Labouiche, France
  • SubterraneaLabyrinth pod Zelným trhem, Czech Republic
  • GorgeLabyrinthe, Luxembourg
  • SubterraneaCaves and Labyrinths, Ukraine
  • ShowcaveLac Souterrain St-Léonard, Switzerland
  • MineMina De Oro La Carolina, Argentina
  • ShowcaveGrotte de Lacave, France
  • SubterraneaRestaurant La Cave, France
  • SubterraneaLa Caverna, Honduras
  • SubterraneaLa Caverne, Netherlands
  • KarstLaguna Lachua, Guatemala
  • MineLackawanna Coal Mine Tour, United States of America
  • SubterraneaLa Claustra Hotel, Switzerland
  • SubterraneaLa Coupole, France
  • MineMines d’argent de La Croix-aux-Mines, France
  • CaveLa Cuevita, Costa Rica
  • SubterraneaBunker Ladeburg, Germany
  • SubterraneaLærdalstunnelen, Norway
  • ShowcaveCaverne Laflèche Caves, Canada
  • SpringLa Fuente, Panama
  • ShowcaveLagang Cave, Malaysia
  • CaveGruta da Lage Branca, Brazil
  • ShowcaveGruta do Lago Azul, Brazil
  • SubterraneaGrotte del Lago Grande, Italy
  • SubterraneaLagOmar, Spain
  • KarstLago di Telese, Italy
  • SubterraneaLa Grotte de Glace La Grave La Meije, France
  • CaveLa Gruta, Panama
  • SubterraneaLa Gruta, México
  • CaveLaguna Cave, Belize
  • ShowcaveLaichinger Tiefenhöhle, Germany
  • KarstLajedo de Soledade, Brazil
  • ShowcaveMargaret River Caves - Lake Cave, Australia
  • ShowcaveLake Shasta Caverns, United States of America
  • SubterraneaLalibela, Ethiopia
  • MineMusée de la Mine à La Machine, France
  • SpringLama La Vita, Italy
  • SubterraneaGrotta Lamalunga, Italy
  • SubterraneaGrottes de Lamberta, Switzerland
  • SubterraneaLamgao Buddhist Caves, India
  • GorgeLammeröfen, Austria
  • CaveGrotta dei Lamponi, Italy
  • ShowcaveLamprechtsofen, Austria
  • CaveGruta da Lancinha, Brazil
  • MineHornické muzeum OKD Landek, Czech Republic
  • GorgeLandgrafenschlucht, Germany
  • CaveLandmannahellir, Iceland
  • SubterraneaBatteri Landsort, Sweden
  • ShowcaveLang’s Cave, Malaysia
  • MineLangbans Mines, Sweden
  • GorgeFelslabyrinth Langenhennersdorf, Germany
  • SubterraneaHöhlenwohnungen in Langenstein, Germany
  • MineKupferschieferbergwerk Lange Wand, Germany
  • SubterraneaLangjökull Glacier Grotto, Iceland
  • GorgeGorges de la Langouette, France
  • MineNOAH Langøya, Norway
  • GorgeLanner Gorge, South Africa
  • ShowcaveLanquín Caves, Guatemala
  • SubterraneaLanson, France
  • ShowcaveXixia Laojun Cave, China
  • ShowcaveChongqing Laojun Cave, China
  • ShowcaveChongqing Laolong Cave, China
  • ShowcaveLao Mei, China
  • CaveVirgem da Lapa, Brazil
  • ShowcaveGruta Lapa Doce, Brazil
  • ShowcaveGruta da Lapa Grande, Brazil
  • ShowcaveGruta da Lapa Nova, Brazil
  • CaveGruta do Lapão, Brazil
  • CaveGruta do Lapão, Brazil
  • ShowcaveGruta Lapa Velha, Brazil
  • ShowcaveCueva de La Peña, Spain
  • ShowcaveGruta da Lapinha, Brazil
  • SubterraneaLes Lapidiales, France
  • CaveGħar Lapsi, Malta
  • KarstSentier karstique de La Romieu-Gazaupouy, France
  • SubterraneaFort Troglodytique de La Roque Gageac, France
  • SpringNacedero del Larráun, Spain
  • MineHistorische Kupferzeche am Larzenbach, Austria
  • MineLa Salina, Spain
  • SubterraneaLascaris War Rooms, Malta
  • ShowcaveGrotte de Lascaux, France
  • SubterraneaLas Cuevas, Spain
  • KarstLos Callejones de Las Majadas, Spain
  • ShowcaveCueva de las Manos, Argentina
  • MineLas Médulas, Spain
  • ShowcaveCueva de Las Palomas, Spain
  • KarstBalneario Las Pozas, Guatemala
  • CaveLasse-Maja Grottan, Sweden
  • MineLast Chance Mining Museum, United States of America
  • MineLast Chance Mine, United States of America
  • SubterraneaLastiver Cave, Armenia
  • ShowcaveGrotte de Lastournelle, France
  • ShowcaveCueva de la Lastrilla, Spain
  • CaveCaverne des Lataniers, France
  • MineLa Thuile Mine, Italy
  • SubterraneaLatomie, Italy
  • ShowcaveAbri de Laugerie-Haute, France
  • MineParque Minero de La Unión, Spain
  • SubterraneaLaunois Père & Fils, France
  • ShowcaveLaurel Caverns, United States of America
  • CaveCavernas de Laurel, Perú
  • SubterraneaLaurent-Perrier, France
  • ShowcaveGrotte des Lauriers, France
  • MineHistorisches Silberbergwerk Lautenthals Glück, Germany
  • CaveLava Beds Caves, United States of America
  • MineLavakeller, Germany
  • SubterraneaLa Valette Underground Military Museum, Great Britain
  • CaveLava River Cave - Newberry National Volcanic Monument, United States of America
  • ShowcaveLa salle de La Verna, France
  • CaveGrotte de Laveuses, France
  • ShowcaveTham Lawa, Thailand
  • ShowcaveGoa Lawah, Indonesia
  • ShowcaveGoa Lawa Purbalingga, Indonesia
  • MineLaxey Wheel, Great Britain
  • CaveLayser Cave, United States of America
  • SpringLaywell, Great Britain
  • KarstLa Zaplaz, Romania
  • ShowcaveGrotte du Lazaret, France
  • ShowcaveLeamington Caves, Bermuda
  • MineLebanon Silver Mine, United States of America
  • SubterraneaGua Lebar, Indonesia
  • MineMines de sel de Bex, Switzerland
  • SubterraneaLe Caveau, France
  • CaveLechuguilla Cave, United States of America
  • CaveCueva de la Lechuzas, Perú
  • CaveLedena pećina, Montenegro
  • CaveLedena Pećina, Serbia
  • ShowcaveLedenika, Bulgaria
  • ShowcaveLedge View Nature Center, United States of America
  • CaveLedová jeskynĕ, Czech Republic
  • MineCanadian Energy Museum, Canada
  • SubterraneaLee Ice House, Great Britain
  • MineSchieferpark Lehesten, Germany
  • ShowcaveLehman Caves, United States of America
  • ShowcaveLeichtweißhöhle, Germany
  • CaveLeiðarendi, Iceland
  • SpringFfynnon Leinw, Great Britain
  • MineMusée de la Mine Le Molay Littry, France
  • MineVolcan de Lemptégy, France
  • SubterraneaLenagala Rajamaha Vihara, Sri Lanka
  • MineEisenerzgrube Lengede-Broistedt, Germany
  • MineKalkwerk Lengefeld, Germany
  • MineGrube Lengenbach, Switzerland
  • GorgeLennard River Gorge, Australia
  • CaveLenore Caves, United States of America
  • SubterraneaLenyadri Caves, India
  • CaveCaverna de Leo, Perú
  • MineSchaubergwerk Leogang, Austria
  • MineGrube Leonie, Germany
  • ShowcaveLepenitza Cave, Bulgaria
  • SubterraneaLe Prince Noir, France
  • SpringLerna, Greece
  • SubterraneaLa Grotte de Glace Les Arcs, France
  • SubterraneaLa Grotte de Glace Les 2 Alpes, France
  • SubterraneaMusée National de Préhistoire, France
  • SubterraneaLes Maisons de Cappadoce, Turkey
  • SubterraneaLes Terrasses d’Uchisar, Turkey
  • CaveGrotta di S. Angelo di Lettomanoppello, Italy
  • GorgeLeutasch-Klamm Wasserfallsteig, Austria
  • MineLevant Mine, Great Britain
  • MineLeveäniemigruvan, Sweden
  • CaveLeviathan Lava Tube, Kenya
  • SubterraneaLevon’s Divine Underground, Armenia
  • MineCentre Historique Minier Lewarde, France
  • ShowcaveLewis and Clark Caverns State Park, United States of America
  • MineLewis Merthyr Colliery, Great Britain
  • KarstLi’angahuo ’a Maui, Tonga
  • CaveLiang Bua Cave, Indonesia
  • ShowcaveLiánhuā dòng, China
  • ShowcaveLianzhou Underground River Scenic Area, China
  • CaveLiar’s Cave, Bulgaria
  • SubterraneaMusée de la Libération de Paris, France
  • CaveLībiešu upuralas, Latvia
  • SubterraneaLiboriusklause, Germany
  • SubterraneaLice Ashâb-ı Kehf Mağarası, Turkey
  • MineTrau auf Gott Erbstolln Lichtenberg, Germany
  • CaveLidbergsgrottorna, Sweden
  • SubterraneaCarrières de la Lie, France
  • GorgeLiechtensteinklamm, Austria
  • CaveLighthouse Cave, Bahamas
  • SpringLileiko Mati, Greece
  • CavePeştera Liliecilor, Romania
  • KarstRimstone Pools of the Lillach River, Germany
  • SubterraneaLima Catacombs, Perú
  • CaveLimestone Caves, Australia
  • ShowcaveGruta do Limoeiro, Brazil
  • MineMaison de l’Or en Limousin, France
  • ShowcaveGrotte de Limousis, France
  • ShowcaveLincoln Caverns, United States of America
  • CaveGrotte de Lindéralique, New Caledonia
  • ShowcaveLinggu Dong, China
  • ShowcaveLingqi Karst Cave, China
  • ShowcaveLing Shan Cave, China
  • ShowcaveLingyan Cave, China
  • ShowcaveYiyuan Lingzhi Cave, China
  • ShowcaveLinkenboldshöhle, Germany
  • CaveLinno Gu, Myanmar
  • SpringLintvern, Slovenia
  • ShowcaveLinville Caverns, United States of America
  • ShowcaveLion’s Cave, China
  • MineLion Salt Works, Great Britain
  • CaveLipci Cave, Montenegro
  • CaveLiphofung Rock Shelter, Lesotho
  • CaveLippoldshöhle, Germany
  • ShowcaveLipska Pecina, Montenegro
  • SubterraneaPodzemie pod vežami, Slovakia
  • SubterraneaLisboa Roman Galleries, Portugal
  • SpringSource du Lison, France
  • SubterraneaLiss Ard, Ireland
  • MineLithgow State Mine, Australia
  • MineGruvemuseet på Litlabø, Norway
  • CaveLitli Björn - Vörðuhellir, Iceland
  • SubterraneaZámecké sklepení Litomyšl, Czech Republic
  • SubterraneaFort de Litroz, Switzerland
  • MineLittle American Mine, United States of America
  • KarstLittle Huson Cave Park, Canada
  • ShowcaveLiuku Show Cave, China
  • MineMusée de la Mine du Livet, France
  • MineLKAB Gruvmuseum, Sweden
  • ShowcaveCueva de Llamazares, Spain
  • MineThe Welsh Slate Museum, Great Britain
  • MineChwarel Hên Llanfair, Great Britain
  • ShowcaveCuevo del Llanos, Spain
  • MineLlechwedd Slate Cavern, Great Britain
  • GorgeKanioni i Llëngës, Albania
  • SubterraneaLlewelyn’s Cave, Great Britain
  • CaveCueva de Llonín, Spain
  • CaveCova Del Llop Marí, Spain
  • ShowcaveCuevas de la Lluera, Spain
  • MineLlywernog Silver-Lead Mine Museum, Great Britain
  • SubterraneaLocal Cave House, Turkey
  • SubterraneaHöhlenburg Loch, Germany
  • SubterraneaBurg Loch, Austria
  • MineLockgruvan, Sweden
  • SubterraneaLockport Cave Raceway Tour, United States of America
  • MineMaison de la Mine à Locmaria-Berrien, France
  • CaveLocso-on Cave, The Philippines
  • ShowcaveLóczy barlang, Hungary
  • ShowcaveTham Lod, Thailand
  • SubterraneaLötschberg-Basistunnel, Switzerland
  • SubterraneaLöwengrube, Germany
  • CaveLoizos Cave, Greece
  • CaveLojzova Jama, Slovenia
  • ShowcaveJaskinia Łokietka, Poland
  • MineGammelgruva Løkken, Norway
  • ShowcaveŠpilja Lokvarka, Croatia
  • ShowcaveGrutas de Lol-Tún, México
  • MineLomax Placer Mine, United States of America
  • ShowcaveGrotte de Lombrives, France
  • SubterraneaLondon Underground, Great Britain
  • SpringLonetopf, Germany
  • KarstLoneversickerung, Germany
  • KarstLonggang Tiankeng, China
  • ShowcaveLonggong Caves, China
  • ShowcaveLonggong Cave, Jiangxi, China
  • ShowcaveLonghorn Caverns, United States of America
  • ShowcaveLongkong Dong, China
  • ShowcaveLong Lin Palace, China
  • KarstLonglin Shihai, China
  • ShowcaveLong Men Dong, China
  • SubterraneaLongmen Grottoes, China
  • CaveLongmendong, China
  • ShowcaveLongquan Cave, China
  • GorgeLongshuixia Difeng, China
  • ShowcaveLongtan Karst Cave, China
  • MineLong Tunnel Extended Gold Mine, Australia
  • ShowcaveLongxian Palace, China
  • ShowcaveLongyan Cave, China
  • CaveLongyearbreen Grotte, Norway
  • SubterraneaLongyou Caves, China
  • MineLoos Koboltgruva, Sweden
  • CaveLos Nacimientos, Guatemala
  • ShowcaveCueva de Los Pajaritos, Argentina
  • MineLost Mine, United States of America
  • SubterraneaLost Caves, Great Britain
  • KarstLost Lake, United States of America
  • ShowcaveLost River Caverns, United States of America
  • ShowcaveLost River Cave and Valley, United States of America
  • ShowcaveLost Sea, United States of America
  • ShowcaveLost World Caverns, United States of America
  • CaveThe Lost World, New Zealand
  • ShowcaveCueva de Los Verdes, Spain
  • KarstTham Lot Puyu, Thailand
  • ShowcaveLotus Cave, China
  • SpringSource de la Loue, France
  • ShowcaveLoufang Cave, China
  • KarstLoughareema, Ireland
  • MineSztolni Królowa Luiza, Poland
  • MineMina subterrânea de Sal-Gema de Loulé, Portugal
  • SubterraneaGrotta di Lourdes del Beato Claudio, Italy
  • MineMuseu Mineiro do Lousal, Portugal
  • KarstLove Bridge, Cyprus
  • SubterraneaLowLine, United States of America
  • ShowcaveGoa Lowo Trenggalek, Indonesia
  • CaveTham Luang Nang Non, Thailand
  • ShowcaveTham Luang Pha Wiang, Thailand
  • SubterraneaLubang Jepang, Indonesia
  • SubterraneaLublova Torturak, Molvanîa
  • KarstLúčansky Vodopád, Slovakia
  • ShowcaveLucas Cave, Australia
  • SubterraneaLucca City Walls Basement, Italy
  • CaveCueva del Lucero, Puerto Rico
  • MineMuseo de La Lucha Obera, México
  • ShowcaveLudi Yan - Reed Flute Cave, China
  • GorgeLud’s Church, Great Britain
  • MineLudvika Gruvmuseum, Sweden
  • MineBesucherbergwerk Grube Ludwig, Germany
  • CaveLudwigshöhle, Germany
  • GorgeLudwigsklamm, Germany
  • KarstLügenstein, Germany
  • CaveLuegstein Höhle, Germany
  • MineLugnås Minnesfjäll, Sweden
  • MineMuseo Mineralogico Luigi Celleri, Italy
  • SubterraneaMuseo di Speleologia Luigi Fantini, Italy
  • ShowcaveGrotte de la Luire, France
  • CaveLullinvuori Luola, Finland
  • CaveLumiang Cave, The Philippines
  • ShowcaveLumingsen Valley Tourist Resort, China
  • CaveGruta Luminosa, Brazil
  • ShowcaveLummelundagrottan, Sweden
  • ShowcaveHang Lùng Khúy, Vietnam
  • CaveLuobi Cave, China
  • ShowcaveLuocheng Changsheng Dong, China
  • ShowcaveLuojishan Fairy Cave, China
  • ShowcaveLuō mèi liánhuā dòng, China
  • ShowcaveHang Luồn, Vietnam
  • SubterraneaMuseo ng Libingan sa Ilalim ng Lupa, The Philippines
  • SubterraneaLupercale, Italy
  • CaveGrotte di Luppa, Italy
  • ShowcaveLuray Caverns, United States of America
  • ShowcaveLurgrotte Peggau, Austria
  • ShowcaveLurgrotte Semriach, Austria
  • CaveLusk Cave, Canada
  • ShowcaveGrottes de Lustin, Belgium
  • SubterraneaLutetia´s Sewer System, France
  • CaveLuyang Cave, The Philippines
  • ShowcaveLuzhou Fairy Cave, China
  • SubterraneaLuzit Caves, Israel
  • GorgeLydford Gorge, Great Britain
  • CaveLydstep Caverns, Great Britain
  • ShowcaveSpilaio Aggitis, Greece
  • CaveMaarata Cave, Bulgaria
  • SubterraneaMaastricht Kazematten, Netherlands
  • SubterraneaMaastunnel, Netherlands
  • ShowcaveMabaj Cave, Lebanon
  • SpringMabinay Spring, The Philippines
  • ShowcaveMacahambus Cave, The Philippines
  • SubterraneaMuseu Vulcanoespeleológico "Machado Fagundes", Portugal
  • SubterraneaMa’arat HaMachpelah, Israel
  • KarstMackinac Island State Park, United States of America
  • KarstPropast Macocha, Czech Republic
  • MineMacraes Mine, New Zealand
  • ShowcaveGua Madai, Malaysia
  • CaveLa Cave Madame, Mauritius
  • MineMadan Museum of Ore Mining and Mining Industry, Bulgaria
  • ShowcaveGrotte de la Madeleine, France
  • ShowcaveAbri de la Madeleine, France
  • MineMadison Coal Museum, United States of America
  • ShowcaveGrotta della Madonna, Italy
  • CaveMadonna della Grotta, Italy
  • SubterraneaSantuario della Madonna della Grotta di Bombile, Italy
  • SubterraneaSantuario della Madonna della Grotta, Italy
  • CaveChiesa Cripta Madonna della Grotta, Italy
  • SubterraneaMadonna della Corona, Italy
  • SubterraneaMadonna delle Virtù, Italy
  • SubterraneaChiesa Rupestre della Madonna della Croce, Italy
  • SubterraneaChiesa della Madonna del Parto, Italy
  • ShowcaveGua Madu, Malaysia
  • CaveTham Mae Lana, Thailand
  • CaveTham Mae Nang Montho, Thailand
  • SubterraneaMaeshowe, Great Britain
  • MineParc Miner del Maestrat, Spain
  • ShowcaveTham Mae Usa, Thailand
  • ShowcaveTham Mae Usu, Thailand
  • MineBergbaumuseum Maffeischächte, Germany
  • SubterraneaMagdalena-Einsiedelei, Switzerland
  • SubterraneaMagická Jeskyně, Czech Republic
  • CaveMagili, Armenia
  • SubterraneaFestungsmuseum Magletsch, Switzerland
  • SubterraneaMagnanerie de Bourré, France
  • SubterraneaFarmacia del Mago Greguro, Italy
  • ShowcaveMagura, Bulgaria
  • MineMagyar Olaj- és Gázipari Múzeum, Hungary
  • SubterraneaMahabalipuram Caves, India
  • SubterraneaMahakali Caves, India
  • ShowcaveMaharani Zoo dan Goa, Indonesia
  • CaveMahendra Gupha, China
  • ShowcaveMahendra Guffa, Nepal
  • SubterraneaMahendravadi Cave Temple, India
  • SubterraneaMaiji Shan Caves, China
  • SubterraneaMailly Grand Cru, France
  • CaveMaimu Cave, Estonia
  • SubterraneaMaison Forte, France
  • SubterraneaMaison Owl, Japan
  • ShowcaveCueva de la Majahua, México
  • ShowcaveMajestic Caverns, United States of America
  • CaveMajlis Al-Jin, Oman
  • ShowcaveMakauwahi Cave, United States of America
  • ShowcaveMaki-do, Japan
  • MineMalå Geo Museum, Sweden
  • CaveTham Malai, Thailand
  • SpringMalanaphy Springs, United States of America
  • CaveMalá Pravčická Brána, Czech Republic
  • CaveLe Scialet de Malaterre, France
  • CaveMalayil Kallan Guha, India
  • CaveMalcham Salt Cave, Israel
  • CaveGrotta a Male, Italy
  • SubterraneaShpella e Maligradit, Albania
  • SubterraneaMalinta Tunnel, The Philippines
  • MineMalmberget Iron Mine, Sweden
  • MineCarrières souterraines de la Malogne, Belgium
  • SubterraneaMalovaný sklep, Czech Republic
  • KarstSentier Karstique des Malrochers, France
  • SubterraneaVictorian Music Hall Malt Cross, Great Britain
  • CaveCueva de Maltravieso, Spain
  • GorgeRokle Malý Kyseľ, Slovakia
  • CaveJama Mamet, Croatia
  • SpringMammoth Spring, United States of America
  • ShowcaveMammoth Cave National Park, United States of America
  • ShowcaveMargaret River Caves - Mammoth Cave, Australia
  • SpringMammoth Hot Springs, United States of America
  • ShowcaveDachstein-Mammuthöhle, Austria
  • ShowcaveGrutas del Mamut, México
  • SubterraneaMonastery Cave Restaurant, North Macedonia
  • CaveJacuzzi of Manati, Puerto Rico
  • SubterraneaManazan Mağaraları, Turkey
  • SubterraneaManchester Cave, United States of America
  • CaveCaverna da Mandaçaia, Brazil
  • SubterraneaMandarado Yagura Caves, Japan
  • ShowcaveGruta da Mangabeira, Brazil
  • MineMinas de Manganeso de Puras de Villafranca, Spain
  • KarstMangapohue Natural Bridge, New Zealand
  • SubterraneaMangapwani Slave Cave, Tanzania
  • CaveMangapwani Coral Cavern, Tanzania
  • CaveGrotta Mangiapane, Italy
  • SubterraneaMangupKale, Russia
  • ShowcaveŠpilja Manita Peć, Croatia
  • SubterraneaManitou Cliff Dwellings, United States of America
  • ShowcaveManjang Gul, South Korea
  • ShowcaveManjushree Gufa, Nepal
  • ShowcaveGruta Manoel Iôiô, Brazil
  • MineMansfeld Museum, Germany
  • ShowcaveGrotta Maona, Italy
  • ShowcaveMaori Leap Cave, New Zealand
  • KarstMapu’a a Vaea, Tonga
  • ShowcaveGruta do Maquiné, Brazil
  • CaveMaquoketa Caves State Park, United States of America
  • ShowcaveMarakoopa Cave, Australia
  • ShowcaveMaramagambo Caves, Uganda
  • SpringMaramec Spring, United States of America
  • SubterraneaMar Antonios Kozhaya, Lebanon
  • SubterraneaDeir Mar Antonios, Egypt
  • ShowcaveGrotta di Maratea, Italy
  • SubterraneaMaratika Gufa, Nepal
  • ShowcaveGrutas de las Maravillas, Spain
  • ShowcaveCueva de las Maravillas, Dominican Republic
  • ShowcaveGruta de las Maravillas de Ibdes, Spain
  • ShowcaveMarble Arch Caves, Ireland
  • SubterraneaDomaine de Marc Brédif, France
  • MineLe musée de la Mine Marcel Maulini, France
  • SubterraneaMusée Mémorial de la Ligne Maginot du Rhin, France
  • SubterraneaCuevas de la Mare de Deu, Spain
  • ShowcaveMarengo Cave National Landmark, United States of America
  • KarstVai Marere, Cook Islands
  • SubterraneaMaresha, Israel
  • SubterraneaMargate Caves, Great Britain
  • SubterraneaMargate Grotto, Great Britain
  • KarstTannes et glacières du Margériaz, France
  • ShowcaveGoa Margo Tresno, Indonesia
  • SubterraneaBaños de Doña María de Padilla, Spain
  • CaveGruta da Maria Encantada, Portugal
  • SubterraneaMaria im Stein, Germany
  • SubterraneaZambra María la Canastera, Spain
  • MineMiniexpozíca Ťažby a Spracovania Bridlice v Marianke, Slovakia
  • ShowcaveMaribel New Hope Cave, United States of America
  • ShowcaveMarie-Jeanne Cave, Haiti
  • MineBesucherbergwerk Marie Louise Stolln, Germany
  • MineMarienglashöhle, Germany
  • GorgeMarienschlucht, Germany
  • MineŠtoly Marie pomocná a Koňská jáma, Czech Republic
  • SubterraneaRistorante Grotta Marinara, Italy
  • CaveMarkova Pećina, Serbia
  • SubterraneaMarkt Höhler, Germany
  • ShowcaveMark Twain Cave, United States of America
  • MineBesucherbergwerk Markus Semmler, Germany
  • SubterraneaMonastery of Mar Lishaa, Lebanon
  • CaveBurg Marmels, Switzerland
  • CaveCatedral de Marmol, Chile
  • CaveMarneef Cave, Oman
  • CaveCaverna do Maroaga, Brazil
  • SubterraneaDomačija Marof, Slovenia
  • SubterraneaMaropeng, South Africa
  • SubterraneaMar Qayuma Monastery, Iraq
  • MineMusée départemental du Sel de Marsal, France
  • SubterraneaLes Caves de Marson, France
  • CaveMarstrand Caves, Sweden
  • SubterraneaG.H. Martel et C°, France
  • KarstSima Martel, Venezuela
  • MineMartha Mine, New Zealand
  • CaveGisement préhistorique du Martinet, France
  • CaveCueva de Martín Infierno, Cuba
  • CaveMartinsloch, Switzerland
  • GorgeMartvili Canyon, Georgia
  • ShowcaveMarvel Cave, United States of America
  • CaveMary Campbell Cave, United States of America
  • MineMary Kathleen Mine, Australia
  • SubterraneaMary King’s Close, Great Britain
  • ShowcaveAven de Marzal, France
  • MineMiniera Marzoli, Italy
  • MineMúzeum baníctva a hutníctva Maša, Slovakia
  • CaveGrotta di Masaniello, Italy
  • MineMascot Mine, Canada
  • CaveCuevas del Masical, Honduras
  • SubterraneaMasitise Cave House Museum, Lesotho
  • KarstHammam Maskhoutine, Algeria
  • SubterraneaRifugio Antiaereo Martana, Italy
  • CaveGrotto of Massabielle, France
  • CaveMassacre Cave, Great Britain
  • MineMuseo della Miniera Massa Marittima, Italy
  • MineMuseo di Arte e Storia delle Miniere, Italy
  • SubterraneaMaison des Pierreux de Massangis, France
  • MineMiniera di Masua, Italy
  • MineMinas de Matahambre, Cuba
  • SubterraneaMatala Caves, Greece
  • ShowcaveGrottes de Matata, France
  • ShowcaveTham Mat Cha Pla Won, Thailand
  • MineMatchless Mine, United States of America
  • SubterraneaMaterasum Ipogeo, Italy
  • SpringMatevulu Blue Hole, Vanuatu
  • CaveĐộng Mã Tiên, Vietnam
  • SubterraneaThe Cave Homes of Matmâta, Tunisia
  • CaveGrotta Matromania, Italy
  • CaveMatsuda Limestone Cave, Japan
  • SubterraneaMatsushiro Underground Imperial Headquarters, Japan
  • ShowcaveJaskyňa mŕtvych netopierov, Slovakia
  • CaveMátyáshegy barlang, Hungary
  • SubterraneaMauerwald, Poland
  • CaveMau Mau Caves, Kenya
  • CaveMau Mau Cave Nairobi, Kenya
  • CaveMauna Loa Tree Molds, United States of America
  • MineDůl Mauritius, Czech Republic
  • CaveMavri Spilia - Black Cave, Greece
  • CaveMavri Spilia, Greece
  • ShowcaveMawjymbuin Cave, India
  • ShowcaveKrem Mawsmai, India
  • MineBergbau-Schaustollen Max, Germany
  • ShowcaveGrottes de Maxange, France
  • ShowcaveMaximiliansgrotte, Germany
  • SubterraneaMaximushöhle - The "Catacombs" of Salzburg, Austria
  • MineMayener Grubenfeld, Germany
  • MineMusée de May-sur-Orne, France
  • SubterraneaMazi Underground Settlement, Turkey
  • CaveGrottes de Mbanza-Ngungu, République Démocratique du Con
  • KarstMcConnell Springs, United States of America
  • SubterraneaMcGregor’s Cave, Great Britain
  • ShowcaveMeadowcroft Rockshelter, United States of America
  • MineMuseo de la Minería del País Vasco, Spain
  • ShowcaveJaskinia w Mechowie, Poland
  • MineMecsek Bányászati Múzeum, Hungary
  • ShowcaveĐộng Mê Cung, Vietnam
  • SubterraneaGruta de la Virgen de la Medalla Milagrosa, Argentina
  • CaveMedicine Rocks State Park, United States of America
  • SubterraneaMedieval Louvre Underground, France
  • CaveSantuário da Penha, Portugal
  • ShowcaveGrotte de Médous, France
  • MineMedvedia štôlňa, Slovakia
  • CaveMedvidina špilja, Croatia
  • SubterraneaHöhler von Meerane, Germany
  • SubterraneaLouisville Mega Cavern, United States of America
  • CavePećina Megara, Bosnia and Herzegovina
  • SubterraneaMega Spiléo - The Great Cave, Greece
  • SubterraneaMeidan Bazar, Georgia
  • ShowcaveMeishan Longgong Karst Cave, China
  • ShowcaveMejiro-do, Japan
  • SubterraneaMelek-Chesmensky Kurgan, Russia
  • ShowcaveSpilaio tou Melidoniou, Greece
  • ShowcaveLimni Melissani, Greece
  • MineMusée des Mines d’Argent des Rois Francs, France
  • SubterraneaMělnické Podzemí, Czech Republic
  • ShowcaveMencilis Mağarası, Turkey
  • CaveMendenhall Ice Caves, United States of America
  • ShowcaveCueva de Mendukilo, Spain
  • ShowcaveMenfudo shonyudo, Japan
  • SubterraneaCuevas de Menga y Viera, Spain
  • ShowcaveMenggong Guanyin Dong, China
  • ShowcaveMeramec Caverns, United States of America
  • CaveGrotte delle Meraviglie, Italy
  • ShowcaveMercer Caverns, United States of America
  • SubterraneaMercier, France
  • SubterraneaGrotte de la Mer de Glace, France
  • KarstSentier Karstique du Grand Bois, France
  • MineErlebnis Bergwerk Merkers, Germany
  • CaveMerlin’s Cave, Great Britain
  • CaveMermaid’s Lair Cave, Bahamas
  • ShowcaveMermerna Pecina, Serbia
  • KarstPozzo del Merro, Italy
  • ShowcaveGrotte Prehistorique des Merveilles, France
  • ShowcaveGrotte Merveilleuse, Algeria
  • ShowcaveGrotte La Merveilleuse, Belgium
  • CaveMesa Arch, United States of America
  • SubterraneaMesa Verde NP, United States of America
  • CaveCaves of Messalit, Morocco
  • SubterraneaBalma del Messere, Italy
  • ShowcaveGrottes de Beaume les Messieurs, France
  • CaveMészégető-forrásbarlang, Hungary
  • MineRömerbergwerk Meurin, Germany
  • KarstMewlaghmore Dolines, Ireland
  • SubterraneaDie Meyerschen Stollen, Switzerland
  • ShowcaveLe Grand Canyon de Meyrangle, France
  • ShowcavePeştera Meziad, Romania
  • MineRudnik svinca in cinka Mežica, Slovenia
  • CaveMezmaiskaya Cave, Russia
  • MineDůl Michal, Czech Republic
  • SubterraneaOuvrage du Michelsberg, France
  • ShowcaveMicheongul, South Korea
  • ShowcaveLa Micoque, France
  • SubterraneaMiedzyrzecki Rejon Umocniony, Poland
  • CaveMikaelshulen, Norway
  • MineUnderground Kingdom Mikawa Mu Valley, Japan
  • SubterraneaMikurodo Cave, Japan
  • ShowcaveGrotte de Milandre, Switzerland
  • CaveMilarepa’s Cave, China
  • CaveMilatos Andron, Greece
  • SubterraneaMileştii Mici, Moldova
  • SubterraneaMilk Grotto Chapel, Israel
  • ShowcaveMilky Way Glow Worm Cave, New Zealand
  • CaveMillennium Cave, Vanuatu
  • SubterraneaMillennium Underground Museum, Hungary
  • MineMillican Daltons Cave, Great Britain
  • SubterraneaMillie Mine Bat Cave, United States of America
  • GorgeAguas Turquesas Millpu, Perú
  • ShowcaveCueva del Milodon, Chile
  • SubterraneaCatacombs of Milos, Greece
  • MineAltes Kalkbergwerk Miltitz, Germany
  • SubterraneaMilton House, United States of America
  • CaveMimbi Caves, Australia
  • SubterraneaLa Forteresse de Mimoyecques, France
  • ShowcaveGoa Mimpi, Indonesia
  • MineMuseo de la Mineria, México
  • CaveCueva de Las Minas, Guatemala
  • SubterraneaSklep pod Novou Radnicí, Czech Republic
  • ShowcaveMindemoya Cave, Canada
  • SubterraneaMine Howe, Great Britain
  • MineMinera Lead Mines, Great Britain
  • MineMinerail, France
  • SubterraneaMuseum of Mineralogy, Petrology and Mineral Resources, Bulgaria
  • MineMuseo dei Minerali Elbani, Italy
  • MineMineraliengrotte Vorderkrimml, Austria
  • SubterraneaMineralienhöhler, Germany
  • SubterraneaMiners’ Dugouts, Australia
  • MineMiners Heritage Walk-In Mine, Australia
  • CavePonts Naturels à Minerve, France
  • SubterraneaMines & Meadows ATV Riding Resort, United States of America
  • MineMines View Park, The Philippines
  • CaveMingyan Ancient Temple, China
  • CaveMinigill Cave, Canada
  • SubterraneaMinnesota Museum Of Mining, United States of America
  • MineSmaragdgruvene Byrud Gård, Norway
  • ShowcaveMinnetonka Cave, United States of America
  • MineMinntac Plant, United States of America
  • MineMintaro Slate Quarries, Australia
  • MineMir Diamond Mine, Russia
  • SubterraneaCave of Miracles, United Arab Emirates
  • ShowcaveGrotta del Miracolo, Italy
  • ShowcaveGrutas de Mira de Aire, Portugal
  • KarstPolje de Mira-Minde, Portugal
  • SpringMiskolctapolca Barlangfürdő, Hungary
  • MineMission Mine, United States of America
  • MineMissouri Mines State Historic Site, United States of America
  • CaveCavernas Misteriosas, Brazil
  • MineCave Creek Mistress Mine, United States of America
  • ShowcaveMitchell Caverns, United States of America
  • MineMitchells Gully Gold Mine, New Zealand
  • ShowcaveMitchelstown Cave, Ireland
  • CaveMitha Cave, Oman
  • SubterraneaMithraeum, Italy
  • SubterraneaMithraeum San Clemente, Italy
  • ShowcaveMitsugo shonyudo, Japan
  • SubterraneaMittelbau Dora - Mittelwerk Dora, Germany
  • CaveL-għar ta´ Mixta, Malta
  • ShowcaveMiyama Shonyudo, Japan
  • CaveMizamiza Cave, Tanzania
  • CaveMizonoguchi dokutsu, Japan
  • ShowcaveMladečské jeskyně, Czech Republic
  • CaveMlynky Cave, Ukraine
  • CavePeștera Moanei, Romania
  • ShowcaveMoaning Caverns, United States of America
  • SubterraneaMissouri Botanical Garden, United States of America
  • SpringIzviri v Močilnik, Slovenia
  • SubterraneaModlivý důl, Czech Republic
  • ShowcaveModra Spilia - Blue Grotto, Croatia
  • CaveModrić Špilja, Croatia
  • ShowcaveGrutas da Moeda, Portugal
  • GorgeMöllschlucht, Austria
  • MineMønsted Kalkgruber, Denmark
  • SubterraneaMoët & Chandon, France
  • MineMogok Gem Mines, Myanmar
  • ShowcaveGrottes des Moidons, France
  • SubterraneaLa Cave Aux Moines, France
  • CaveMokolea Lava Pools, United States of America
  • CaveMokranjska Miljacka, Bosnia and Herzegovina
  • SubterraneaMuzeum vltavínů, Czech Republic
  • KarstPulo di Molfetta, Italy
  • SubterraneaPuig des Molins Nekropolis, Spain
  • MineMollie Kathleen Mine, United States of America
  • CaveMolnár János-barlang, Hungary
  • ShowcaveHang Mỏ Luông, Vietnam
  • SubterraneaMuseum of Old and New Art, Australia
  • KarstMonasterio de Piedra Natural Park, Spain
  • SubterraneaMonastery Cave Hotel, Turkey
  • MineMón De Sal, Spain
  • CaveGrotta Monello, Italy
  • CaveMonfort Bat Cave, The Philippines
  • KarstKarstlehrpfad Monheimer Alb, Germany
  • CaveMonks’ Prison, Greece
  • SubterraneaLes Caves Monmousseau, France
  • SubterraneaMonsanto, Portugal
  • ShowcaveMontagu Guano Cave, South Africa
  • MineParco Minerario del Monte Amiata, Italy
  • ShowcaveGrotta del Monte Capriolo, Italy
  • MineMuseo delle Miniere di Montecatini, Italy
  • ShowcaveGrotta di Monte Cucco, Italy
  • CaveGrotta del Monte Ermada, Italy
  • ShowcaveMontelimar Cave, Nicaragua
  • MineMiniera Monteponi, Italy
  • SubterraneaMontepulciano La Città Sotterranea, Italy
  • CaveGrotta del Monte Querceto, Italy
  • SubterraneaMonte Sant’Angelo sul Gargano, Italy
  • ShowcaveCueva de Montesinos, Spain
  • MineMiniera Montevecchio, Italy
  • ShowcaveGrotta di Montevicoli, Italy
  • SubterraneaMontezuma Castle National Monument, United States of America
  • KarstMontezuma Well, United States of America
  • ShowcaveGrotte de Mont-Fat, Belgium
  • CaveGrotte de Montgaudier, France
  • KarstChaos de Montpellier-le-Vieux, France
  • SubterraneaLa Ville Souterraine, Canada
  • MineMontreal Goldfield, Australia
  • CaveSanta Cova de Montserrat, Spain
  • SubterraneaRéservoir de Montsouris, France
  • SubterraneaCisternas Romanas de Monturque, Spain
  • SubterraneaMatera Olive Oil Museum, Italy
  • SubterraneaTemple of the Moon, Perú
  • ShowcaveMargaret River Caves - Moondyne Cave, Australia
  • KarstMoon Hill, China
  • KarstMoonhole, Saint Vincent and the Grenadin
  • ShowcaveMoon Water Cave, China
  • SubterraneaTunnels of Moose Jaw, Canada
  • CaveMoqal Cave, Oman
  • CaveMoqui Cave, United States of America
  • SubterraneaMoqui Sand Caves, United States of America
  • CaveTham Morakot, Thailand
  • MineSchaubergwerk Morassina, Germany
  • SubterraneaMoravská Banka Vín, Czech Republic
  • KarstDům přírody Moravského krasu, Czech Republic
  • MineMorden Colliery, Canada
  • CaveMordloch, Germany
  • SubterraneaCave Bar More, Croatia
  • MineMorefield Gem Mine, United States of America
  • MineMorenci Mine, United States of America
  • CaveParaje de la Morería, Spain
  • CaveCueva de Morgan, Colombia
  • ShowcaveGrottes de Morgat, France
  • MineBesucherstollen Morgenstern, Germany
  • CaveMorgia Sant’Angelo, Italy
  • MineMuseo delle Miniere di Morgnano, Italy
  • MineKhazad-dûm, Middle-Earth
  • CaveCaverna do Morro do Couto, Brazil
  • MineMorro do Ouro, Brazil
  • CaveCaverna do Morro Preto, Brazil
  • SubterraneaTunnel du Mortier, France
  • MineMorwellham Quay, Great Britain
  • SubterraneaMoscow Metro, Russia
  • MineMoseløkken Stenbrudsmuseum, Denmark
  • ShowcaveMo So Cave, Vietnam
  • CaveMotena Cave, Georgia
  • ShowcaveMother Shipton’s Cave, Great Britain
  • SubterraneaMotouleng Caves, South Africa
  • CaveMotuanga Cave, Cook Islands
  • ShowcaveLes Moulins Souterrains du Col-des-Roches au Locle, Switzerland
  • ShowcaveGrotte de Moulis, France
  • CaveLaboratoire Souterrain de Moulis, France
  • ShowcaveCave of the Mounds, United States of America
  • MineMountain Maid Gold Mine, Australia
  • ShowcaveMoun Ta Wa Cave, Myanmar
  • MineMount Lyell Copper Mine, Australia
  • CaveMount Suswa Caves, Kenya
  • MineCova dos Mouros, Portugal
  • ShowcaveAbri du Moustier, France
  • CavePeştera Movile, Romania
  • CaveMozrovi, Armenia
  • ShowcaveMramornaja, Russia
  • ShowcaveŠpilja Mramornica, Croatia
  • ShowcaveJaskinia Mroźna, Poland
  • CaveMt Omuro Lava Caves, Japan
  • KarstHang Múa, Vietnam
  • ShowcaveTham Muang On, Thailand
  • KarstCenotes Hacienda Mucuyché, México
  • MineBergbau- und Heimatmuseum Mühlbach, Austria
  • CaveMühlbachquellhöhle, Germany
  • SpringSpring von Mühlberg, Germany
  • CaveMühlheimer Höhle, Germany
  • MineAlaunwerk Mühlwand, Germany
  • CaveCueva de la Muerte, Costa Rica
  • ShowcavePeştera Muierilor, Romania
  • SubterraneaMukyudou, Japan
  • ShowcaveMulgol Cave, South Korea
  • GorgeValle dei Mulini, Italy
  • ShowcaveMulwaree Cave, Australia
  • CaveMumba Rockshelter, Tanzania
  • SubterraneaG.H. Mumm, France
  • MineMungyeong Coal Museum, South Korea
  • CaveMunkastova Cave, Faroe Islands
  • SubterraneaMuqattam Mountain Cave Cathedral, Egypt
  • ShowcaveCueva de los Murciélagos, Spain
  • SubterraneaMuro Iwa Cave, Japan
  • ShowcaveMusanze Cave, Rwanda
  • SubterraneaMusée du Vin, France
  • CaveMusejnaja, Russia
  • SubterraneaMuseo Arqueológico, Spain
  • MineMuseo civico archeologico del Distretto minerario, Italy
  • SubterraneaMuseo Canario, Spain
  • SubterraneaMuseu de Minas Ouro Prêto, Brazil
  • SubterraneaMuseu de Temàtica Espeleològica, Spain
  • SubterraneaSlovenské múzeum ochrany prírody a jaskyniarstva, Slovakia
  • SubterraneaWaitomo Caves Discovery Centre, New Zealand
  • SubterraneaMuseum Hotel, Turkey
  • KarstMuseum Karst Indonesia, Indonesia
  • SubterraneaMuseo della Scultura Contemporanea Matera, Italy
  • SubterraneaMustang Caves, Nepal
  • SubterraneaCistern of Ancient Mycenae, Greece
  • CaveJaskinia Mylna, Poland
  • SubterraneaRock-cut Tombs in Myra, Turkey
  • SubterraneaMysterium Fidei, Malta
  • ShowcaveMystery Cave, United States of America
  • ShowcaveMystic Caverns, United States of America
  • MineZeche Nachtigall, Germany
  • SpringEl Nacimiento, México
  • CaveCuoléto de Nadale, Italy
  • CaveLedová Jeskyně Naděje, Czech Republic
  • SpringIzvir Nadiže, Slovenia
  • SubterraneaNagarjuna Caves, India
  • ShowcaveNahal Me’arot Caves, Israel
  • KarstCenote Naharon, México
  • CaveNahehe Cave, Fiji
  • CaveNaica Crystal Caves - Cueva de las Espadas - Cueva de los Cristales, México
  • KarstNaigu Stone Forest, China
  • CaveNaj Tunich, Guatemala
  • ShowcaveNakabari Limestone Cave, Japan
  • KarstNakalele Blowhole, United States of America
  • ShowcaveNakatonbetsu Limestone Cave, Japan
  • GorgeNakatsu Gorge, Japan
  • GorgeTham Nakha, Thailand
  • SubterraneaNakilbent Sarnıçı, Turkey
  • CaveNakimu Caves, Canada
  • ShowcaveNakoroloaloa Cave, Fiji
  • SubterraneaMănăstirea Nămăiești, Romania
  • SubterraneaTham Nam Bang, Thailand
  • MineGoldbergwerk Name Gottes, Germany
  • CaveTham Nam Khao Siva, Thailand
  • KarstNammongyi Blue Lagoon, Myanmar
  • KarstTsingy de Namoroka, Madagascar
  • MineNanaimo Museum, Canada
  • ShowcaveNanaori shonyudo, Japan
  • ShowcaveNanatsugama shonyudo, Japan
  • SpringNanda Blue Hole, Vanuatu
  • ShowcaveTham Nang Ene, Laos
  • GorgeNanjiang Grand Canyon, China
  • ShowcaveNanjing Ape Man Cave, China
  • KarstNanjing Tianshengqiao, China
  • SubterraneaNanshiku Temple, China
  • SubterraneaLa Cité Souterraine de Naours, France
  • CaveGrotte de Napoléon, France
  • SubterraneaMuseo del Sottosuolo Napoletano, Italy
  • SubterraneaNapoli Sotterranea, Italy
  • ShowcaveJeskyne Na Pomezi, Czech Republic
  • MineMiniera di Naracauli, Italy
  • SubterraneaHorreum de Narbonne, France
  • SubterraneaNarni Sotterranea, Italy
  • ShowcaveNarusawa Fuketsu, Japan
  • SubterraneaNarva Victoria Bastioni kasematid, Estonia
  • KarstNascente Azul, Brazil
  • SubterraneaNashoba Brook Stone Chamber, United States of America
  • ShowcaveJeskyně Na Špičáku, Czech Republic
  • ShowcaveGruta do Natal, Portugal
  • MineNational Coal Mining Museum for England, Great Britain
  • KarstNational Corvette Museum, United States of America
  • SubterraneaNational Justice Museum, Great Britain
  • SubterraneaNárodi Technické Muzeum, Czech Republic
  • SubterraneaGrotto of the Nativity, Israel
  • KarstNatural Arch Scenic Area, United States of America
  • ShowcaveNatural Bridge Caverns, United States of America
  • ShowcaveNatural Bridge Caverns, United States of America
  • ShowcaveCaverns at Natural Bridge, United States of America
  • KarstNatural Bridge of Arkansas, United States of America
  • KarstNatural Bridge State Resort Park, United States of America
  • KarstAlabama’s Natural Bridge, United States of America
  • SubterraneaNatural History Museum Rijeka, Croatia
  • ShowcaveNatural Stone Bridge and Caves, United States of America
  • CaveNatural Tunnel, United States of America
  • ShowcaveNatur Eis Palast Hintertuxer Gletscher, Austria
  • SubterraneaMuseum Festung Nauders, Austria
  • ShowcaveNaung Mya Hlwe Cave, Myanmar
  • KarstVai Nauri, Cook Islands
  • ShowcaveNavenakhevi Cave, Georgia
  • SubterraneaNavghan Kuvo, India
  • MineNaypyitaw Gem Museum, Myanmar
  • CaveGrotte de Ndimba Dimba, République Démocratique du Con
  • CaveNeanderthal, Germany
  • ShowcaveNebelhöhle, Germany
  • SubterraneaNecromanteion of Ephyra, Greece
  • MineNederland Mining Museum, United States of America
  • KarstNeedle’s Eye, United States of America
  • SubterraneaNeischlhöhle, Germany
  • CaveNeitsikoobas, Estonia
  • SubterraneaNemo 33, Belgium
  • MineMina de Sal de Nemocón, Colombia
  • MineNenthead Mines Heritage Centre, Great Britain
  • ShowcaveGrottes de Neptune, Belgium
  • ShowcaveLa Cueva de Nerja, Spain
  • SubterraneaNeronian Cryptoporticus, Italy
  • CaveNesmith Cave, United States of America
  • CaveSpílio tou Nestóros - Nestor’s Cave, Greece
  • SubterraneaNetherton Tunnel Branch Canal, Great Britain
  • ShowcaveNettle Cave, Australia
  • ShowcaveGrotte di Nettuno, Italy
  • GorgeNeubeurer Wolfsschlucht, Germany
  • MineNeubulach - Hella-Glück-Stollen, Germany
  • MineMusée des Mines de Fer de Neufchef, France
  • KarstKarstkundlicher Wanderweg Neuhaus/Pegnitz, Germany
  • SubterraneaCasemate de Neunhoffen, France
  • MineNeustädtler Hobbybergwerk, Germany
  • MineNevada State Museum Silver Mine Exhibit, United States of America
  • CaveSpeleo Rando de la Tanne du Neve, France
  • SubterraneaNevşehir Yeraltı Şehri, Turkey
  • ShowcaveNewdegate Cave (Hastings Caves), Australia
  • SubterraneaNewgrange, Ireland
  • MineNew Mexico Mining Museum, United States of America
  • SubterraneaNewnes Glow Worm Tunnel, Australia
  • CaveNezer Cave, Israel
  • ShowcaveNezhnaya Cave, Russia
  • CaveNgalue Cave, Mozambique
  • ShowcaveNgarua Caves, New Zealand
  • ShowcaveNgilgi Cave, Australia
  • SpringGiếng Ngọc Gia Sinh, Vietnam
  • CaveGrotte Ngovo, République Démocratique du Con
  • ShowcaveĐộng Ngườm Ngao, Vietnam
  • MineNgwenya Mine, Eswatini
  • ShowcaveNhi Thanh Cave, Vietnam
  • ShowcaveNiagara Cave, United States of America
  • ShowcaveGua Niah, Malaysia
  • ShowcaveGrotte de Niaux, France
  • SubterraneaNorthern Ireland´s Secret Bunker, Ireland
  • SubterraneaCave of Nicanor, Israel
  • SubterraneaLa Crypte Archéologique de Nice, France
  • ShowcaveGrottes de Nichet, France
  • MineNicolai-Stollen, Czech Republic
  • CaveNidlenloch, Switzerland
  • ShowcaveNiedaltdorfer Tropfsteinhöhle, Germany
  • ShowcaveJaskinia Niedźwiedzia, Poland
  • ShowcaveEvil Dragon Cave/Righteous Dragon Cave, China
  • ShowcaveJaskinia Nietoperzowa, Poland
  • CaveNigardsbreen Ice Cave, Norway
  • SubterraneaFortress of Niha, Lebanon
  • ShowcaveNikau Cave, New Zealand
  • SubterraneaDie historische Grotte in den Herrenhäuser Gärten, Germany
  • SpringNilavarai Bottomless Well, Sri Lanka
  • ShowcaveNildiya Pokuna Cave, Sri Lanka
  • SubterraneaNilometer, Egypt
  • CaveNimara Mağarası, Turkey
  • KarstChaos de Nîmes-le-Vieux, France
  • SpringLaguna de la Niña Encantada, Argentina
  • CaveSt Ninian’s Cave, Great Britain
  • ShowcaveGħar Ninu, Malta
  • ShowcaveNippara shonyudo, Japan
  • SubterraneaBunkermuseum RAW Nippes, Germany
  • MineNippon Mining Museum, Japan
  • CaveNiter Ice Cave, United States of America
  • SubterraneaPigeonnier de la Niverdière, France
  • CaveCave Nivida, Panama
  • ShowcaveNixhöhle, Austria
  • KarstNixseebecken, Germany
  • CaveNiya-Thiya Cave, Japan
  • MineBanícka a geologická expozícia v Nižnej Slanej, Slovakia
  • CaveNjoro River Cave, Kenya
  • CaveNkila Ntari Cave, République du Congo
  • MineThe No. 9 Mine & Museum, United States of America
  • MineNobesawa Ginkodo, Japan
  • CaveNoccalula Falls, United States of America
  • ShowcaveNodong Cave, South Korea
  • MineMusée de la Mine Noeux-les-Mines, France
  • CaveNohoch Nah Chich, México
  • SpringNõiakaev, Estonia
  • SubterraneaNoirmont Command Bunker, Great Britain
  • ShowcaveNonsuch Caves, Jamaica
  • SubterraneaAtlantikwall Museum Noordwijk, Netherlands
  • ShowcaveNoravank, Armenia
  • MineGruvmuseet Norberg, Sweden
  • MineNordmarks museum, Sweden
  • ShowcaveGrottes de la Norée, France
  • ShowcaveNorth Glory Hole, Australia
  • SubterraneaNorth Head Tunnels, New Zealand
  • SubterraneaNorwich Guildhall Crypt, Great Britain
  • SubterraneaFarkaskői Alkotótelep, Hungary
  • GorgeNothklamm, Austria
  • MineEisenerzgrube Nothweiler, Germany
  • SubterraneaNotranjski muzej Postojna, Slovenia
  • SubterraneaNotre Dame du Scex, Switzerland
  • SubterraneaCity of Caves, Great Britain
  • SubterraneaNottingham Castle Cave Tours, Great Britain
  • SubterraneaMuseum of Nottingham Life, Great Britain
  • MinePohronské múzeum Nová Baňa, Slovakia
  • CaveNovakova pećina, Bosnia and Herzegovina
  • GorgeParco Fluviale Novella, Italy
  • ShowcaveNovomuradymovskaya Peshchera, Russia
  • ShowcaveNovoafonskaya, Georgia
  • MineMuzeum Gornictwa Podziemnego w Nowej Rudzie, Poland
  • MineMusée de la mine de Noyant-d’Allier, France
  • MineNational Stone Centre, Great Britain
  • CaveNuevo Tolima, Colombia
  • SubterraneaNull Stern Hotel, Switzerland
  • ShowcaveNuoshui Dongtian, China
  • ShowcaveGrotta Nuova, Italy
  • CaveNurau Hohle, Cook Islands
  • SubterraneaUnderground City of Nushabad, Iran
  • CaveNutty Putty Cave, United States of America
  • MineNy-Ålesund By- og Gruvemuseum, Norway
  • ShowcaveAmabera ga Nyinamwiru, Uganda
  • ShowcaveSpílaio Nymfón, Greece
  • SubterraneaHoly Cave Nymphaeum, Greece
  • CaveGrotte aux Nymphes, Switzerland
  • MineNyvångs kolgruva, Sweden
  • SubterraneaFeste Obergentringen, France
  • MineOberharzer Bergwerksmuseum, Germany
  • SubterraneaRöhrenbunker am Oberlandesgericht, Germany
  • MineGipsbergwerk Oberwiesen, Switzerland
  • MineBergbau- und Mineralienmuseum Oberwolfach, Germany
  • MineHistorische Silbergruben Oberzeiring, Austria
  • ShowcaveObir Tropfsteinhöhlen, Austria
  • MineWISMUT Objekt 90, Germany
  • CaveJaskinia Obłazkowa, Poland
  • CaveObodska Cave, Montenegro
  • ShowcaveGrotte de l’Observatoire, France
  • KarstOcean Hole, Bahamas
  • SpringSa Oche ’e Su Bentu, Italy
  • CaveOchozská jeskynĕ, Czech Republic
  • ShowcaveOchtinska Aragonitova Jaskyna, Slovakia
  • KarstWasserbaum von Ockensen, Germany
  • MineSalina Ocnele Mari, Romania
  • MineMina de Visitação Octávio Fontana, Brazil
  • ShowcaveOdaira shonyudo, Japan
  • CaveOdelsteinhöhle, Austria
  • MineOdin Mine, Great Britain
  • CaveOdisejeva Špilja, Croatia
  • MineÖblarner Kupferweg, Austria
  • MineBergbaumuseum Oelsnitz, Germany
  • ShowcaveÖtscher Tropfsteinhöhle, Austria
  • GorgeÖtschergräben, Austria
  • CaveOfnethöhlen, Germany
  • ShowcaveOgba Ogbunike, Nigeria
  • MineOgoya Mine Museum, Japan
  • SpringOgulla Spring, Ireland
  • ShowcaveOhio Caverns, United States of America
  • ShowcaveOhtake shonyudo, Japan
  • ShowcaveOhtaki shonyudo, Japan
  • MineCentre de la mine et du chemin de Fer Oignies, France
  • CaveUamh an Oir, Great Britain
  • SpringOja de Agua, México
  • SubterraneaEkspozycja Przyrodnicza Ojców, Poland
  • ShowcaveOjika-do, Japan
  • SpringOjo de Agua, México
  • SubterraneaOjo Guareña, Spain
  • MineMinas de Ojos Negros, Spain
  • SubterraneaOjukwu Bunker, Nigeria
  • GorgeOkatse Canyon, Georgia
  • ShowcaveCave Okinawa, Japan
  • MineOkubo Mabu Mine, Japan
  • CaveCaverna de la Olada, Perú
  • MineOld Cardinal Gem Mine, United States of America
  • SubterraneaOld City Hall Station, United States of America
  • MineOld Dominion Mine Park, United States of America
  • MineOld Hundred Gold Mine Tour, United States of America
  • MineOld New-Gate Prison & Copper Mine, United States of America
  • ShowcaveOld Spanish Treasure Cave, United States of America
  • MineOld Timers Mine, Australia
  • KarstOld Water Wheel, Australia
  • KarstO’Leno State Park, United States of America
  • ShowcaveOlentangy Indian Caverns, United States of America
  • ShowcaveOlgahöhle, Germany
  • CaveCaverna Olhos D’Água, Brazil
  • ShowcaveGrotte di Oliero, Italy
  • ShowcaveSpilia Olimbi, Greece
  • MineNorsk Oljemuseum, Norway
  • MineOljeön, Sweden
  • CaveCueva de la Olla, México
  • CaveOlla Quemada, Costa Rica
  • GorgeOl Njorowa Gorge, Kenya
  • CaveOloolua Cave, Kenya
  • GorgeCheile Oltețului, Romania
  • CaveOlumo Rock, Nigeria
  • MineOlympic Dam Mine, Australia
  • SpringIzvor Omble, Croatia
  • KarstGorges d’Ombleze, France
  • ShowcaveCaverna de Omia, Perú
  • ShowcaveOnagara shonyudo, Japan
  • ShowcaveCueva de Oñati-Arrikrutz, Spain
  • ShowcaveOndaldong Gul, South Korea
  • GorgeOneota Gorge, United States of America
  • ShowcaveGrotta dell’Onferno, Italy
  • ShowcaveLas grutas de Ongamira, Argentina
  • SubterraneaOnigashima Cave, Japan
  • ShowcaveOnondaga Cave, United States of America
  • ShowcaveOnyx Cave at Guntown Mountain, United States of America
  • ShowcaveOnyx Mountain Caverns, United States of America
  • ShowcaveOnyx Cave Park, United States of America
  • MineSlovenské Opálové Bane, Slovakia
  • KarstOparara Arch, New Zealand
  • SubterraneaPodziemia Opatowskie w Opatowie, Poland
  • SubterraneaOppenheimer Kellerlabyrinth, Germany
  • CaveOptymistychna, Ukraine
  • ShowcaveOrakei Korako, New Zealand
  • KarstCascada de Orbaneja del Castillo, Spain
  • GorgeGorges de l’Orbe, Switzerland
  • SubterraneaL’Orbiere, France
  • CaveOrdinskaya Peschtera, Russia
  • ShowcaveOregon Caves, United States of America
  • ShowcaveOrgan Cave, United States of America
  • ShowcaveAven d’Orgnac, France
  • GorgeOribi Gorge, South Africa
  • ShowcaveOrient Cave, Australia
  • CaveGrotte d’Orjobet, France
  • ShowcaveOrlovaca Cave, Bosnia and Herzegovina
  • ShowcaveOrlova Čuka, Bulgaria
  • CaveGrottes de Ornolac, France
  • CaveCueba de Oro, The Philippines
  • SubterraneaMuseo del Oro Bogotá, Colombia
  • SubterraneaMuseo del Oro Precolombino, Costa Rica
  • MineOroszlány Bányász Múzeum, Hungary
  • MineOrphan Girl Mine, United States of America
  • ShowcaveCueva de la Orquidea, México
  • ShowcaveLa Grotta dell’Orso, Italy
  • ShowcaveCuevas de Ortigosa, Spain
  • SubterraneaOrvieto, Italy
  • MineOsarizawa Mine, Japan
  • CaveOsawa Limestone Cave, Japan
  • SubterraneaGrotte di Osimo, Italy
  • MineMuseum Industriekultur Osnabrück, Germany
  • GorgeSenda del Oso, Spain
  • SubterraneaOsowka Complex, Poland
  • ShowcaveGrotte d’Osselle, France
  • SubterraneaOssian’s Cave, Great Britain
  • CaveOssian’s Cave, Great Britain
  • CaveOssian’s Cave, Great Britain
  • GorgeSkalní město Ostaš, Czech Republic
  • MineBergbau- und Industriemuseum Ostbayern, Germany
  • GorgeL’Orrido di Osteno, Italy
  • ShowcaveOsterhöhle, Germany
  • MineHüttenstollen Osterwald, Germany
  • CaveJaskinia Ostrężnicka, Poland
  • SubterraneaOstrog Monastery, Montenegro
  • GorgeOstrovské Skály, Czech Republic
  • SubterraneaTemple in the Tomb of Ostrusha, Bulgaria
  • GorgeOsugidani Gorge, Japan
  • GorgeKanioni i Osumit, Albania
  • CaveOsuzawa Limestone Cave, Japan
  • CaveOswaldhöhle, Germany
  • CaveOtate Cave, Japan
  • KarstOtliško Okno, Slovenia
  • ShowcaveOtoska Jama, Slovenia
  • SubterraneaCastello di Otranto, Italy
  • KarstOttensee, Germany
  • MineGrube Otto, Germany
  • SubterraneaOtto Photo Underground Photographic Gallery, Australia
  • CaveGrottes de Oualidia, Morocco
  • CaveOur Lady Of The Grotto, Malta
  • CaveCaverna Ouro Grosso, Brazil
  • SubterraneaLe Musée de l’Ours de Cavernes, France
  • ShowcaveOutlaw Cave Tours, United States of America
  • MineOutokummun Kaivosmuseo, Finland
  • KarstCascades d’Ouzoud, Morocco
  • CaveOven’s Caves, Canada
  • SubterraneaOwensboro Area Museum of Science and History, United States of America
  • CaveOweynagat - Cave of Crúachu, Ireland
  • CaveOweynagolman Cave, Ireland
  • ShowcaveGrutas de Oxtotitlan, México
  • MineOya History Museum, Japan
  • ShowcaveOylat Mağaraları, Turkey
  • KarstOyo Azul, Dominican Republic
  • SubterraneaOyster Bar, United States of America
  • SubterraneaGrand Central Oyster Bar, Japan
  • CaveŌzakai Cave Dwelling Site, Japan
  • ShowcaveOzark Caverns, United States of America
  • CaveOzernaya Cave, Ukraine
  • ShowcaveOziđana pećina, Croatia
  • ShowcaveGrotta di San Michele, Italy
  • SubterraneaÖzkonak Yeralti Şehri, Turkey
  • SubterraneaÖzlüce Yeraltı Şehri, Turkey
  • ShowcavePac Bo Cave, Vietnam
  • SubterraneaEstación de Pacífico, Spain
  • ShowcavePadah-Lin Caves, Myanmar
  • ShowcavePadamyar Cave, Myanmar
  • ShowcaveGouffre de Padirac, France
  • CaveGruta do Padre Caio, Brazil
  • MinePæska Skiferbrudd, Norway
  • ShowcaveTham Pa Fa, Laos
  • SubterraneaGrotta Paglicci, Italy
  • CavePahiyangala, Sri Lanka
  • CavePaia Dwarfs Cave, Samoa
  • GorgePailon del Diablo, Ecuador
  • KarstPain de Sucre, France
  • SubterraneaPainshill Park’s Crystal Grotto, Great Britain
  • CavePainted Cave, United States of America
  • KarstBois de Paiolïve, France
  • ShowcaveGrotte de Pair-non-Pair, France
  • CavePaisley Caves, United States of America
  • CavePaistjärven Pirunkirkko, Finland
  • CaveGruta Dos Paiva, Brazil
  • SubterraneaPodzemni grad Paklenice, Croatia
  • ShowcaveTham Pak Ou, Laos
  • CavePakshipathalam Guha, India
  • MinePalabora Copper Mine, South Africa
  • CaveGruta del Palacio, Uruguay
  • CaveCueva Palacio del Rey, Perú
  • MineMinas Do Palácio Velho, Brazil
  • CavePalaha Cave, Niue
  • MinePalais de la Mine, France
  • KarstTorcas de los Palancares, Spain
  • CaveGrotta Palazzese, Italy
  • SubterraneaMitreo di Palazzo Barberini, Italy
  • CaveGrotta di Pale, Italy
  • SubterraneaPaleo Stone Age Gunungkidul, Indonesia
  • CaveCueva de Palestina, Perú
  • SpringPalfauer Wasserloch, Austria
  • ShowcaveGruta dos Palhares, Brazil
  • SubterraneaCementiri de Palma, Spain
  • ShowcaveCueva del Palmarito, Cuba
  • SubterraneaPalmaz Vineyards, United States of America
  • SubterraneaParco Urbano dei Palmenti, Italy
  • SubterraneaPalm Jumeirah Underpass, United Arab Emirates
  • SubterraneaPalombaro Lungo, Italy
  • CaveGrotta delle Palombe, Italy
  • CaveGrotta dei Palombi, Italy
  • ShowcavePálvölgyi Barlang, Hungary
  • SpringPamukkale, Turkey
  • ShowcaveCueva de los Panaderos, Cuba
  • SubterraneaPanagia Chrysopiliotissa Church, Cyprus
  • SubterraneaChurch of Panagia Evangelistria, Cyprus
  • CavePanagia Kakaviotissa, Greece
  • SubterraneaPanagia Spiliani, Greece
  • CavePanagia Spiliani, Greece
  • SubterraneaPanagia Vounarkotissa, Cyprus
  • SubterraneaPanagria Hrysospiliotissa, Greece
  • CavePanama Rocks Scenic Park, United States of America
  • ShowcaveGoa Pancur, Indonesia
  • SubterraneaPandava Caves, India
  • SubterraneaPandavleni Caves, India
  • CavePangagawan Caves, The Philippines
  • SubterraneaPangju Cave, China
  • CavePanhulugan Cave II, The Philippines
  • CavePanhulugan Cave I, The Philippines
  • SpringPanias Spring, Israel
  • CavePannila Cave, Sri Lanka
  • KarstPant y Llyn, Great Britain
  • CavePanxian Dadong, China
  • CavePapanikolís Cave, Greece
  • SubterraneaFromageries Papillon, France
  • CaveParadana Ledenika Jama, Slovenia
  • ShowcaveParadise Lost, Kenya
  • SubterraneaParadise Pansiyon, Turkey
  • ShowcaveParaiso Cave, The Philippines
  • MineParc des Titans, France
  • KarstParco Villa Gregoriana, Italy
  • SubterraneaParc de la Préhistoire, France
  • SubterraneaCova des Pardals, Spain
  • SpringCave Steam Bath "Parenica", Slovakia
  • SubterraneaMusée des Egouts de Paris, France
  • CaveParis Ice Cave, United States of America
  • SubterraneaMétro de Paris, France
  • SubterraneaPotkop Parja, Croatia
  • SubterraneaParkhöhle Weimar, Germany
  • MinePark City Museum, United States of America
  • SubterraneaPark Tunnel, Great Britain
  • SubterraneaParque de la Prehistoria, Spain
  • SubterraneaMuseum of Partisan Glory, Ukraine
  • GorgePartnachklamm, Germany
  • SubterraneaBunkr Parukářka, Czech Republic
  • SubterraneaParvati Buddhist Cave, India
  • KarstPas de Roland, France
  • CavePáskahellir, Iceland
  • MineMinas de Passagem, Brazil
  • CavePeshchery Past’ Drakona, Russia
  • ShowcaveGrotta di Pastena, Italy
  • SubterraneaPataleshwar Cave Temple, India
  • ShowcaveCaverne Patate, Mauritius
  • ShowcaveAbri Pataud, France
  • SubterraneaPATH, Canada
  • SubterraneaReservatório da Patriarcal, Portugal
  • CavePaulinenhöhle, Austria
  • CavePaviland Cave, Great Britain
  • SubterraneaTham Paya Nakarat, Thailand
  • CavePazinska jama, Croatia
  • SpringPeacock Springs, United States of America
  • ShowcavePeak Cavern, Great Britain
  • MinePeak Hill Open Cut Experience, Australia
  • CavePeapea Cave, Samoa
  • SubterraneaCripta del Peccato Originale, Italy
  • KarstCueva de los Peces, Cuba
  • ShowcaveGrotte de Pech Merle, France
  • SubterraneaPskov-Pechory Monastery, Russia
  • CaveJama Pečinka, Slovenia
  • CaveCasa de Pedra, Brazil
  • CaveGruta da Pedra da Santa, Brazil
  • SubterraneaPivnice Pegas Jakubská, Czech Republic
  • SpringPegnitzquelle, Germany
  • ShowcavePeik Chin Myaung Cave, Myanmar
  • MineBergbaumuseum Peißenberg, Germany
  • CaveJeskyně Pekárna, Czech Republic
  • ShowcaveJama Pekel, Slovenia
  • GorgeSoteska Pekel, Slovenia
  • CaveSpilaio sta Pelekita - Sikias Spilios - Cave of Pelekita, Greece
  • CavePelion barlang, Hungary
  • CaveShpella e Pëllumbasit, Albania
  • CaveShpella e Pëllumbave, Albania
  • ShowcaveAlgar do Pena, Portugal
  • CaveCuevas de Pencaligüe, Honduras
  • SubterraneaPendleton Underground Tours, United States of America
  • SubterraneaPeniger Kellerberggänge, Germany
  • KarstBufador de Peñiscola, Spain
  • ShowcavePenn’s Cave, United States of America
  • CavePeppersauce Cave, United States of America
  • ShowcavePerak Cave Temple, Malaysia
  • SubterraneaPeralassery Subrahmanya Temple Pond, India
  • ShowcaveSpelaio Peramatos - Perama Cave, Greece
  • CaveGrotte du Père Noël, Belgium
  • SubterraneaPergola Hotel Cave Bar, Malta
  • SubterraneaMusée d’Art et d’Archéologie du Périgord, France
  • CaveSpilaio Peristeri, Greece
  • MineUnderground Mining Museum Pernik, Bulgaria
  • KarstThe Pernod Accident, France
  • SubterraneaGrottes de Perrier, France
  • SubterraneaCentre des Perrières, France
  • SubterraneaPerrier-Jouët, France
  • ShowcavePerry’s Cave, United States of America
  • GorgePertes de l’Ain, France
  • MineSchaubergwerk Pertisau, Austria
  • ShowcaveGrotta dell’Angelo, Italy
  • SubterraneaMinimetrò Perugia, Italy
  • CavePeštera Pešna, North Macedonia
  • CavePeter’s Cave, Cayman Islands
  • SubterraneaPetersfriedhof Katakomben, Austria
  • SubterraneaLa Petite Perrière, France
  • ShowcaveLa grotte des Petites-Dalles, France
  • ShowcavePetnička Pecina, Serbia
  • SubterraneaPetra Cave City, Jordan
  • ShowcaveSpilaio Petralona, Greece
  • CaveCrkve Sv. Petra i Pavla, Serbia
  • CaveGrotta del Petrienno, Italy
  • MineMusée du Pétrole, France
  • MineParco Museo del Petrolio e delle Energie, Italy
  • MineMuzeul Petrolului, Romania
  • MinePetroșani Mining Museum, Romania
  • SubterraneaPetrov Plže, Czech Republic
  • SubterraneaPetrovaradin Fortress Underground, Serbia
  • ShowcaveGoa Petruk, Indonesia
  • CavePećina Petrus, Serbia
  • SubterraneaLes casemates de la Pétrusse, Luxembourg
  • CavePettyjohn Cave, United States of America
  • MineBanícka Expozícia Pezinok, Slovakia
  • MinePferdegöpel auf dem Rudolphschacht, Germany
  • ShowcaveTham Pha Chom, Thailand
  • CaveTham Pha Daeng, Thailand
  • ShowcaveTham Pha Hong, Thailand
  • MinePhakant Jade Mine, Myanmar
  • ShowcaveTham Pha Kouang, Laos
  • ShowcaveTham Pha Nang Khoi, Thailand
  • SubterraneaTham Pha Thai, Thailand
  • ShowcaveTham Pha Thong, Thailand
  • ShowcaveTham Pha Tok, Laos
  • KarstPhattalung - Phu Khao Ok Thalu, Thailand
  • CaveTham Phet, Thailand
  • ShowcaveTham Phet Pho Tong, Thailand
  • CavePhilipp’s Cave, Namibia
  • SubterraneaLes souterrains de Philippeville, Belgium
  • MineBesucherbergwerk Philippstollen Olsberg, Germany
  • CavePhnom Chhngok Cave Temple, Cambodia
  • CavePhnom Slap Ta’aun Caves, Cambodia
  • ShowcavePhnom Sorsia Cave, Cambodia
  • MinePhoenix Mine, United States of America
  • ShowcavePhong Nha Cave, Vietnam
  • ShowcaveWat Tham Phon Sawan, Thailand
  • CaveTham Phra Nang, Thailand
  • ShowcaveTham Phra Nang Nai, Thailand
  • ShowcaveTham Phra That, Thailand
  • ShowcaveTham Phra Wang Daeng, Thailand
  • ShowcaveTham Phraya Nakhon, Thailand
  • SubterraneaPhugtal Gompa, India
  • ShowcaveTham Phung Chang, Thailand
  • ShowcaveHang Phuong Hoang, Vietnam
  • ShowcavePhu Pha Petch Cave, Thailand
  • MineCava del Piastraio, Italy
  • SubterraneaIpogeo di Piazza Duomo, Italy
  • MinePiccola Miniera Gl.ost srl, Italy
  • CavePictograph Cave, United States of America
  • SubterraneaPidurangala, Sri Lanka
  • GorgeRokle Piecky, Slovakia
  • SubterraneaChiesetta di Piedigrotta, Italy
  • CaveCueva de Piedra Blanca, Honduras
  • CaveCueva de la Piedra Brillante, Perú
  • CaveJaskinia Piekło, Poland
  • KarstLeye Piercing Tiankeng, China
  • SubterraneaPierre et Lumière, France
  • SubterraneaMaison de la Pierre de Volvic, France
  • SpringPießling Ursprung, Austria
  • KarstRiserva Naturale Grotte di Pietrasecca, Italy
  • ShowcaveTham Piew, Laos
  • GorgePihlajamäki Potholes, Finland
  • CaveCuevas del Pilar, Spain
  • SubterraneaGrotte di Pilato, Italy
  • ShowcaveCueva de la Pileta - Pileta Cave, Spain
  • SubterraneaPilikuththuwa Rajamaha Viharaya, Sri Lanka
  • MinePilog Mine, Thailand
  • ShowcaveCueva del Pindal, Spain
  • ShowcavePindaya Cave, Myanmar
  • CaveGua Pindul, Indonesia
  • MinePine Mountain Gold Museum, United States of America
  • CavePinnacles National Monument, United States of America
  • KarstPinnacles, Malaysia
  • CaveCueva Pintada, Spain
  • MineLes mines de Pioch Farrus, France
  • ShowcaveBuco del Piombo, Italy
  • MinePioneer Coal Mine Tunnel, United States of America
  • ShowcavePipadong, China
  • SubterraneaPiper Heidsieck, France
  • ShowcaveLa Cueva del Pirata, Spain
  • CaveCuevas del Pirata, Venezuela
  • CavePirate’s Caves, Cayman Islands
  • CaveShpella e Piratëve, Albania
  • CavePiripiri Cave, New Zealand
  • GorgePirkner Klamm, Austria
  • CaveShpella e Pirogoshit, Albania
  • CavePirunkirkko, Finland
  • KarstPirunpesä, Finland
  • GorgePirunpesä, Finland
  • CavePirunpesä, Finland
  • CavePirunpesä, Finland
  • SubterraneaPiscina Mirabilis, Italy
  • SubterraneaPitalkhora Caves, India
  • CaveGrotte Piteschkummer, Luxembourg
  • CavePiula Cave Pool, Samoa
  • SubterraneaPiusa Koopad, Estonia
  • ShowcavePivka Jama and Crna Jama, Slovenia
  • KarstPivot Rock Park, United States of America
  • SubterraneaPiyamit Tunnel, Thailand
  • SubterraneaPJ’s Underground, Australia
  • ShowcaveTham Pla, Thailand
  • CaveGrotte du Placard, France
  • ShowcaveGrottes des Planches, France
  • ShowcavePlaninska Jama, Slovenia
  • KarstPlaninsko polje, Slovenia
  • CaveTham Pla, Thailand
  • MinePlatteville Mining Museum, United States of America
  • SpringSpring von Plaue, Germany
  • MineAlaunbergwerk Ewiges Leben Plauen, Germany
  • CavePlava pećina, Montenegro
  • SpringTravnik Plava Voda, Bosnia and Herzegovina
  • KarstPlaya Escondida, México
  • MinePleasley Colliery, Great Britain
  • MineBleierzgrube Neu-Glück Plettenberg, Germany
  • SubterraneaPleven Wine Museum, Bulgaria
  • KarstPlitvička Jezera, Croatia
  • SubterraneaRegional Natural History Museum, Bulgaria
  • CavePluto’s Cave, United States of America
  • SubterraneaPlzeňské historické podzemí, Czech Republic
  • SubterraneaMuseum of Strategic Rocket Forces, Ukraine
  • MinePocahontas Exhibition Coal Mine, United States of America
  • SubterraneaMuzeum Zimnej Wojny Podborsko 3001, Poland
  • MineKopalnia Podgórze, Poland
  • CavePodpeška Jama, Slovenia
  • KarstGrotta della Poesia, Italy
  • GorgeGorges de la Poëta-Raisse, Switzerland
  • SubterraneaEremo di Poggio Conte, Italy
  • CavePohara Natural Bridge, New Zealand
  • ShowcaveAbri du Poisson, France
  • ShowcavePolar Caves Park, United States of America
  • CavePolchar Cave, Great Britain
  • MinePoldark Mine, Great Britain
  • MinePôle Historique Minier, France
  • SubterraneaPoli Cave House, Greece
  • CaveLa Grotta di Polla, Italy
  • ShowcavePeştera Polovragi, Romania
  • CaveCyclop’s Cave, Greece
  • ShowcaveCueva del Pomier No 1, Dominican Republic
  • SubterraneaPommery, France
  • SubterraneaLe Troglo des Pommes Tapees, France
  • SubterraneaThrakian Tomb "Hollow Mound" Pomorie, Bulgaria
  • SpringPonce de Leon Springs, United States of America
  • MinePonderosa Saloon Mine, United States of America
  • KarstCenote Ponderosa, México
  • CavePestera Ponicova, Romania
  • ShowcaveTunel Ponikve, Bosnia and Herzegovina
  • KarstPodul Natural de la Ponoarele, Romania
  • CaveCova des Pont, Spain
  • ShowcavePont Bon Dieu Jardin Cave, Mauritius
  • KarstPont d’Arc, France
  • ShowcaveGrottes Pont d’Arcole, Belgium
  • KarstPont de Dieu, Morocco
  • GorgeGorges du Pont du Diable, France
  • MineMusée des Mines d’Argent à Pontgibaud, France
  • CaveGrotte de la Pontoise, France
  • SubterraneaLe patrimoine souterrain de Pontoise, France
  • MineMines De Pont-Péan, France
  • SubterraneaTombs of the Kings of Pontus, Turkey
  • ShowcavePoole’s Cavern, Great Britain
  • MinePooley Hall Colliery, Great Britain
  • KarstPopovo Polje, Bosnia and Herzegovina
  • SpringPoppenröder Quelle, Germany
  • MinePortal 31, United States of America
  • KarstPort Alberni Hole in the Wall, Canada
  • ShowcaveCueva de los Portales, Cuba
  • SubterraneaUnderground Basilica of Porta Maggiore, Italy
  • SubterraneaPorthcurno Telegraph Museum, Great Britain
  • CavePorth yr Ogof, Great Britain
  • CavePeștera Porțile Bihorului, Romania
  • SubterraneaPortland Underground, United States of America
  • SubterraneaPortuguese Cistern, Morocco
  • ShowcavePostojnska Jama, Slovenia
  • MinePotosi Cooperative Mines, Bolivia
  • ShowcavePotpecka Pecina, Serbia
  • CaveGoa Potro Bunder, Indonesia
  • SpringEl Pou Clar, Spain
  • ShowcaveGouffre de Poudrey, France
  • SubterraneaPowintaung Cave Pagodas, Myanmar
  • ShowcaveCueva de Pozalagua, Spain
  • MineMineral de Pozos, México
  • KarstLa dolina Pozzatina, Italy
  • SubterraneaPozzo della Cava, Italy
  • GorgePrachovské skály, Czech Republic
  • MineSalina Praid, Romania
  • KarstPraid, Romania
  • CavePhou Prasat, Laos
  • KarstPrasat Hin Phan Yot, Thailand
  • ShowcaveGruta Pratinha, Brazil
  • CavePravčická Brána, Czech Republic
  • CavePrax Eishöhle, Austria
  • CavePreacher’s Cave, Bahamas
  • MineMiniera di Raibl, Italy
  • ShowcavePredjamska Jama, Slovenia
  • ShowcavePredjamski Grad, Slovenia
  • ShowcaveJama u Predolcu, Croatia
  • SubterraneaLe Fort de Pré-Giroud, Switzerland
  • SubterraneaLe Prehistorama, France
  • SubterraneaPréhistorama Châtelperron, France
  • CavePrekonoška Pećina, Serbia
  • ShowcaveLes Grottes de Presque, France
  • MinePrestongrange Museum, Great Britain
  • MineBesucherbergwerk Prettau, Italy
  • SubterraneaCave du Prieuré, France
  • GorgePříhrazské Skály, Czech Republic
  • MineParco Minerario Cortabbio di Primaluna, Italy
  • ShowcavePrincess Margaret Rose Cave, Australia
  • SubterraneaPrison de Kara, Morocco
  • KarstProgetto Sinkhole, Italy
  • CaveProhodna Cave, Bulgaria
  • CaveProis de Candeleria, Spain
  • ShowcavePrometheus Cave, Georgia
  • SubterraneaProphet Lots Cave, Jordan
  • SubterraneaTomb of the Prophets, Israel
  • SubterraneaProsek hill, Czech Republic
  • ShowcaveProspero’s Cave, Bermuda
  • MineErdöl-Erdgas Museum Prottes, Austria
  • ShowcaveGouffre de Proumeyssac, France
  • KarstVodopad Prskalo, Serbia
  • CaveCueva del Puente, Dominican Republic
  • KarstPuentedey Puente Natural, Spain
  • CavePuente del Diablo, Argentina
  • KarstEl Puente de Dios, México
  • KarstPuerta de Orion, Colombia
  • ShowcaveCueva del Puerto, Spain
  • MinePützlöcher, Germany
  • SubterraneaEl Puig de la Balma, Spain
  • KarstLe Puits de la Brême, France
  • CaveGrotte du Puits Saint Barthélémy, France
  • CavePukaway Cave Underground Lake, The Philippines
  • KarstPulicchio di Gravina, Italy
  • KarstIl Pulo, Italy
  • ShowcaveLa Geoda de Pulpí, Spain
  • KarstDeep Valley of Pulsano, Italy
  • CavePuna Tree Molds, United States of America
  • CavePunakaiki Cavern, New Zealand
  • CavePunarjani Guha, India
  • SubterraneaPunker Baar, Estonia
  • ShowcavePunkevni jeskyne - Punkva River Cave, Czech Republic
  • CaveGrotta dei Puntali, Italy
  • ShowcaveDong Puong, Vietnam
  • SpringPupu Springs, New Zealand
  • SubterraneaKellergasse Purbach, Austria
  • GorgePurgatory Chasm, United States of America
  • KarstPuri di monte Pugliano, Italy
  • MineCaves of Puropetra, Cyprus
  • SubterraneaPusté Kostely, Czech Republic
  • ShowcaveGoa Putri Kencono, Indonesia
  • CaveTham Pu Wai, Thailand
  • CaveHöhlenschoß Puxer Luegg, Austria
  • SubterraneaPuye Cliff Dwellings, United States of America
  • CaveCave of Pythagoras, Greece
  • CaveQala Qala, Bolivia
  • SubterraneaQanat Gesuitico Alto, Italy
  • SubterraneaQanat Gesuitico Basso, Italy
  • SubterraneaQanat di Palermo, Italy
  • CaveQasam Barrani Cave Houses, Malta
  • SubterraneaQasar Masafi Restaurant, United Arab Emirates
  • ShowcaveQianren Cave, China
  • ShowcaveQiaoshan Shenxian Cave, China
  • KarstQifeng Cave, China
  • ShowcaveQiliang Dong, China
  • ShowcaveQilin Cave, China
  • KarstQilin Cave Park, China
  • KarstQingkou Tiankeng, China
  • SubterraneaQingtian Hall, China
  • CaveQingxudong Tianshengqiao, China
  • CaveQixia Shan, China
  • ShowcaveQixingyan Guilin - Seven Star Cave, China
  • ShowcaveQixingyan Zhaoqing - Seven Star Cave, China
  • CaveQuackenschloß, Germany
  • SubterraneaOur Lady Of Quannoubine Monastry, Lebanon
  • ShowcaveHang Quân Y, Vietnam
  • ShowcaveCueva de la Quebrada del Toro, Venezuela
  • MineQueen Mine Tour, United States of America
  • SubterraneaQueen Adelaides Chapel, Great Britain
  • SubterraneaQueen City Underground, United States of America
  • CaveQueens Cave, Kenya
  • SubterraneaQueensway Mersey Tunnel, Great Britain
  • KarstQuelltuffpfad Lingenau, Austria
  • ShowcaveGrottes du Queroy, France
  • MineQuincy Mine Hoist, United States of America
  • SubterraneaQuinta da Regaleira, Portugal
  • ShowcaveLa Gruta del Quintero, México
  • CaveQumran Caves, Israel
  • ShowcaveGhar-e-Qūrī Qal’eh, Iran
  • MineBřidlicové podzemí Raabova štola, Czech Republic
  • SubterraneaRabban Hormizd Monastery, Iraq
  • MineRabensteiner Stollen, Germany
  • CaveRača Špilja, Croatia
  • SubterraneaLa Raccolta delle Acque, Italy
  • ShowcaveRaccoon Mountain Caverns, United States of America
  • SubterraneaUnderground Racquets Ltd., United States of America
  • ShowcaveShpella e Radacit, Serbia
  • CaveCetățile Rădesei, Romania
  • SubterraneaRadeka’s Downunder, Australia
  • KarstRadensko polje, Slovenia
  • SubterraneaRadgonske Gorice, Slovenia
  • SpringRadium Springs Gardens, United States of America
  • MineRadmer Paradeisstollen, Austria
  • ShowcaveJaskinia Radochowska, Poland
  • GorgeRaggaschlucht, Austria
  • SpringRainbow Springs, United States of America
  • CaveRainbow Cave, Iran
  • ShowcaveJaskinia Raj, Poland
  • GorgeRájecké Skály, Czech Republic
  • ShowcaveRajkova Pecina, Serbia
  • CaveTe Ana O Rakanui, Cook Islands
  • ShowcaveRákóczi barlang, Hungary
  • KarstRakov Skocjan Nature Reserve, Slovenia
  • CaveRamble Cave, United States of America
  • SubterraneaLa Cueva de la Ramblera, Spain
  • MineSilberbergwerk Ramingstein, Austria
  • ShowcaveLa Grotte Ramioul, Belgium
  • MineSteinbruchmuseum Rammelsbach, Germany
  • MineRammelsberg, Germany
  • MineBesucherbergwerk Ramsbeck, Germany
  • SubterraneaRamsgate Tunnels, Great Britain
  • ShowcaveGrutas de Rancho Nuevo, México
  • MineRangabotnur Coal Mine, Faroe Islands
  • MineRanger Uranium Mine, Australia
  • CaveRangko Cave, Indonesia
  • SubterraneaRani Ki Vav, India
  • SubterraneaRa Paulette’s Caves, United States of America
  • GorgeRappenlochschlucht, Austria
  • SubterraneaHöhlenburg Rappenstein, Switzerland
  • CaveJaskinia Raptawicka, Poland
  • CaveRasboinichja, Russia
  • CaveCave of Rabbi Shimon bar Yochai, Israel
  • CaveRashōmon Natural Bridges, Japan
  • ShowcaveRastuška Pećina, Bosnia and Herzegovina
  • CaveRat’s Nest Cave, Canada
  • SubterraneaRattlesnake Saloon, United States of America
  • GorgeRattlesnake Canyon, United States of America
  • CaveRäuberhöhle, Luxembourg
  • GorgeRauðfeldsgjá, Iceland
  • ShowcaveRaufarhólshellir, Iceland
  • MineSchieferschaubergwerk Raumland, Germany
  • SubterraneaCaves de Rauzan, France
  • MineGalleria Ravaccione, Italy
  • CaveRavana Cave, Sri Lanka
  • CaveRavanicka Pecina, Serbia
  • SpringRavansar Spring, Iran
  • ShowcaveRavenska Jama, Slovenia
  • ShowcavePecina Ravnistarka, Serbia
  • ShowcaveRawhiti Cave, New Zealand
  • CaveRawis Cave, The Philippines
  • CaveRebecca’s Cave, Cayman Islands
  • MineQuinta das Minas da Recheira, Portugal
  • MineSchieferstollen Recht, Belgium
  • ShowcaveReckenhöhle, Germany
  • ShowcaveGrottes de Réclère, Switzerland
  • SubterraneaRedcliffe Caves, Great Britain
  • SubterraneaThe Grotto of the Redemption, United States of America
  • MineRed Hill Alluvial Mine, Australia
  • GorgeRed River Gorge, United States of America
  • CaveRedwall Cavern, United States of America
  • MineReed Gold Mine, United States of America
  • MineReefton Gold Mine Tours, New Zealand
  • CaveRefsvikhula, Norway
  • SubterraneaKoldkrigsmuseet REGAN Vest, Denmark
  • SubterraneaBurg und Festung Regenstein, Germany
  • SubterraneaLe souterrain de la Règle, France
  • ShowcaveGrotte de Regourdou, France
  • SubterraneaRegro S, Latvia
  • SubterraneaLes grottes du Régulus et des Fontaines, France
  • GorgeReichenbachfall, Switzerland
  • MineBesucherbergwerk Reichenbach-Stolln, Germany
  • MineReichhartschacht, Germany
  • ShowcaveCova do Rei Cintolo, Spain
  • ShowcaveGruta Rei do Mato, Brazil
  • SubterraneaReigando Cave, Japan
  • SubterraneaThe Reigate Caves, Great Britain
  • SubterraneaReims Cryptoportique, France
  • CaveGrotte de la Reine Hortense, New Caledonia
  • MineReinhold Forster Erbstollen, Germany
  • MineErdölmuseum Reinkenhagen, Germany
  • SubterraneaReise Cave, Iran
  • ShowcaveGrotta Remeron, Italy
  • ShowcaveCova Remígia, Spain
  • CaveGrotte Chapelle Notre-Dame De Remonot, France
  • ShowcaveGrottes de Remouchamps, Belgium
  • MineMusée de l’Ardoise et de la Géologie, France
  • CaveSantuario de Vida Silvestre Cavernas de Repechon, Bolivia
  • MineRepublic Iron Mine, United States of America
  • SubterraneaCuevas de la Villa Requena, Spain
  • ShowcaveResavska Pecina, Serbia
  • ShowcaveGrotte di Rescia, Italy
  • MineMiniere dei Resinelli, Italy
  • CaveGrotte des Résistants, France
  • CaveCuevas El Resumidero, Guatemala
  • SubterraneaRe Tarquinio, Italy
  • ShowcaveGrotta del Re Tiberio, Italy
  • SpringIzviri v Retovje, Slovenia
  • SubterraneaRetretti, Finland
  • ShowcaveRettenwandhöhle, Austria
  • SubterraneaRetzer Erlebniskeller, Austria
  • SubterraneaFestungsmuseum Reuenthal, Switzerland
  • CaveAbri Reverdit, France
  • KarstDolina del Revotano, Italy
  • GorgeCaminito del Rey, Spain
  • SubterraneaReykjavik 871±2, Iceland
  • ShowcaveGrutas del Rey Marcos, Guatemala
  • CaveReynard’s Cave, Great Britain
  • SubterraneaEisgrotte Rhonegletscher, Switzerland
  • SpringRhumequelle, Germany
  • GorgeRhummel Gorge, Algeria
  • SubterraneaRhydymwyn Valley Works, Great Britain
  • SubterraneaRibas Underground Camping, Australia
  • ShowcaveRibbon Cave, Australia
  • CaveRibnička Pećina, Serbia
  • MineCentro di Documentazione Miniera di Ribolla, Italy
  • MineSaline Riburg, Switzerland
  • ShowcaveRickwood Caverns, United States of America
  • MineRidi Vihara, Sri Lanka
  • MineRidnaun, Italy
  • MineBergwerk Riedhof, Switzerland
  • SubterraneaCasemate Rieffel, France
  • CaveRiesenburg, Germany
  • ShowcaveDachstein-Rieseneishöhle, Austria
  • MineRiežupes smilšu alas, Latvia
  • MineDe prehistorische vuursteenmijnen van Rijckholt - St. Geertruid, Netherlands
  • CaveRikoriko Cave, New Zealand
  • SubterraneaCave of St. Ivan Rilski, Bulgaria
  • SubterraneaCave of St. Ivan Rilski near Skrino, Bulgaria
  • CaveRimarau Burial Cave, Cook Islands
  • MineMaison de l’ardoise de Rimogne, France
  • SpringRinquelle, Switzerland
  • SubterraneaCarrière Souterraine de Rinval, France
  • KarstRio Camuy Cave Park, Puerto Rico
  • SpringNacimiento Del Rio Choy, México
  • SpringNacimiento del Río Cuervo, Spain
  • CaveCaverna Rio dos Bugres, Brazil
  • CaveRio Frio Caves, Belize
  • SpringNacimiento del Río Genal, Spain
  • SpringNacimiento del Río Lanquín, Guatemala
  • ShowcaveGrotta di Rio Martino, Italy
  • CaveCavernas del Río Nus, Colombia
  • ShowcaveCuevas SaMucuy, Guatemala
  • ShowcaveRio Secreto, México
  • MineParque Minero de Riotinto, Spain
  • KarstSentier karstique de Rioz, France
  • SpringRiri Blue Hole, Vanuatu
  • MineRischbachstollen, Germany
  • SubterraneaCentro de Interpretación de Risco Caído, Spain
  • KarstLos Riscos, Spain
  • KarstBétoire de la Risle, France
  • ShowcavePećina, Serbia
  • GorgeRitterschlucht, Germany
  • ShowcaveRiver Cave, Australia
  • SpringSanta Fe River Rise, United States of America
  • KarstRiversleigh World Heritage Area, Australia
  • CaveRivona Caves, India
  • ShowcaveRoaring River Cave, Jamaica
  • CaveRobber’s Cave, India
  • CaveRobber Baron Cave, United States of America
  • CaveRobbers Cave State Park, United States of America
  • SubterraneaRobber’s Cave, United States of America
  • CaveRobinson Crusoe’s Cave, Chile
  • CaveRoc Cave, The Philippines
  • SubterraneaRoc-aux-Sorciers, France
  • SubterraneaRocca Paolina, Italy
  • KarstRocha de Pena, Portugal
  • CaveGrotte du Château de La Roche, France
  • CaveGrotte Château de La Roche Courbon, France
  • ShowcaveGrotte de Lorette, Belgium
  • SubterraneaVillage troglodyte Rochemenier, France
  • CaveRoche Noire Lava Tubes, Mauritius
  • SubterraneaCave des Roches, France
  • SpringFontaine de Roches, France
  • SubterraneaCueva de la Rocio, Spain
  • SpringRock Springs, United States of America
  • ShowcaveThe Rock Gardens, Great Britain
  • CaveRock House, United States of America
  • ShowcaveRock Spring Cave, Jamaica
  • CaveRockwoods Cave, United States of America
  • MineMine de la Rodde, France
  • SubterraneaRoden Crater, United States of America
  • MineKryvyi Rih Mine, Ukraine
  • MineBesucherbergwerk "Markus-Röhling-Stolln", Germany
  • MineBergbaumuseum Röhrigschacht, Germany
  • GorgeRofflaschlucht, Switzerland
  • KarstSteinerne Rinne bei Rohrbach, Germany
  • ShowcaveRokan-do, Japan
  • KarstTufière de Rolampont, France
  • ShowcaveGrotte de Roland, France
  • MineRolla Experimental Mine, United States of America
  • CaveGrotte des Romains, France
  • SubterraneaCuevas Romanas, Spain
  • CavePestera Romanesti, Romania
  • SubterraneaRomeinse Katacomben, Netherlands
  • SubterraneaCueva de Romeral, Spain
  • ShowcaveRiparo di Romito, Italy
  • ShowcaveRomualdova Špilja, Croatia
  • MineRon Coleman Mining, United States of America
  • ShowcaveYiyuan Rong Dong, China
  • MineBergbaumuseum Ronneburg, Germany
  • CaveBaume de Ronze, France
  • ShowcaveGrotte de Roque St Christophe, France
  • MineOlavsgruva, Norway
  • MineMiniera di Rosas, Italy
  • MineRose Creek Mine, United States of America
  • MineRosemont Copper Mine, United States of America
  • GorgeGletscherschlucht Rosenlaui, Switzerland
  • CaveRosenmüllerhöhle, Germany
  • MineRosevale Mine, Great Britain
  • CaveRosh haNikra, Israel
  • KarstRoški Slap, Croatia
  • CaveRoss Cave, Australia
  • SubterraneaGrutas do Rossio, Portugal
  • MineRossland Mining Museum, Canada
  • MineLehrbergwerk Grube Roter Bär, Germany
  • SubterraneaEishöhle bei Roth, Germany
  • SubterraneaFeste Rothenberg, Germany
  • MineRothschönberger Stolln, Germany
  • ShowcaveGrotte de Rouffignac, France
  • CaveRouiess Cave, Lebanon
  • SpringRound Spring, United States of America
  • ShowcaveRound Spring Cavern, United States of America
  • SubterraneaDomaines Rouvinez, Switzerland
  • CaveGrottan vid Rövarmon, Sweden
  • ShowcaveBuchan Caves - Royal Cave, Australia
  • SubterraneaRoyal Pavilion & Garden, Great Britain
  • MineRoyal Peacock Opal Mines, United States of America
  • SubterraneaRoyston Cave, Great Britain
  • MineBanícke múzeum Rožňava, Slovakia
  • ShowcaveRuakuri Cave, New Zealand
  • CaveRua Rere, Cook Islands
  • ShowcaveRuby Falls, United States of America
  • KarstRudické propadání, Czech Republic
  • MineRudolf-Stollen, Germany
  • SubterraneaRudolfova štola, Czech Republic
  • ShowcaveTham Ruesi, Thailand
  • CaveTham Ruesi Khao Ngu, Thailand
  • SubterraneaTham Ruesi Sombat, Thailand
  • GorgeVodopady Rufabgo, Russia
  • MineRuggles Mine, United States of America
  • CaveRuifeng Temple, China
  • ShowcaveRuijing Cave, China
  • SubterraneaRuinart, France
  • GorgeRuin Aulta, Switzerland
  • ShowcaveCueva del Rull, Spain
  • CaveRumathi Caves, Kenya
  • ShowcaveRushmore Cave, United States of America
  • ShowcaveRussell Cave National Monument, United States of America
  • MineRydal Cave, Great Britain
  • SubterraneaRynek Podziemny, Poland
  • ShowcaveRyongmun Taegul, North Korea
  • ShowcaveRyuga-do, Japan
  • ShowcaveRyugashi-do, Japan
  • ShowcaveRyugu Doketsu Iriguchi, Japan
  • ShowcaveRyujin Limestone Cave, Japan
  • ShowcaveRyukeido, Japan
  • ShowcaveRyusen-do, Japan
  • SubterraneaSaarbrücker Kasematten, Germany
  • MineMuseo de la Siderurgia y la Minería, Spain
  • ShowcaveSabichi Cave, Japan
  • SubterraneaLa Sablière, France
  • SubterraneaHistoric Old Sacramento, United States of America
  • SubterraneaSacred House, Turkey
  • SubterraneaMuseo Cuevas del Sacromonte, Spain
  • CaveSacro Speco, Italy
  • GorgeSadağı Kanyonu, Turkey
  • ShowcaveSaddan Cave, Myanmar
  • MineSado Kinzan, Japan
  • SubterraneaWat Tham Saeng Phet, Thailand
  • CaveSagrada Familia Cave, The Philippines
  • KarstCenote Sagrado, México
  • MineAltos Hornos de Sagunt, Spain
  • ShowcaveSahoolan Cave, Iran
  • CaveTham Sai, Thailand
  • SubterraneaSai Baba Tambun Cave Temple, Malaysia
  • ShowcaveCova de s’Aigua, Spain
  • ShowcaveSaiko Komori-ana, Japan
  • ShowcaveLa Grotte de Saint-Elzéar, Canada
  • SubterraneaGrottes de Saint Antoine, France
  • SubterraneaErmitage Saint Antoine De Galamus, France
  • CaveGrotte de Saint-Antoine, France
  • ShowcaveGrottes de Saint-Cezaire, France
  • ShowcaveGrottes de Saint-Christophe (Grottes des Échelles), France
  • SubterraneaÉglise troglodytique Saint-Christophe, France
  • CaveKisha e Shën Mitrit, Albania
  • SubterraneaOuvrage Sainte-Agnès, France
  • ShowcaveGrotte de Sainte-Baume, France
  • CaveGrotte église de Sainte-Colombe, Switzerland
  • MineMusée de la mine de Saint-Éloy-les-Mines, France
  • SubterraneaÉglise Monolithe Saint-Émilion, France
  • SubterraneaGreek Orthodox Church of Saint Gabriel, Israel
  • CaveThe Caves of Saint Ignacio, México
  • SubterraneaCarrière Saint-Just, France
  • ShowcaveCaverne de Saint-Léonard, Canada
  • MineMusée de la Mine Saint-Lon-les-Mines, France
  • MineSaint Louis Eisenthür, France
  • MineMusée de la mémoire ouvrière, Mines et Mineurs de Provence, France
  • MineMiniere di Saint-Marcel, Italy
  • SubterraneaChampignonnière St Maur, France
  • SubterraneaGrottes de Saint-Maurin, France
  • SpringIzvori Sveti Naum, North Macedonia
  • SubterraneaCluzeaux de Saint-Pardoux-de-Mareuil, France
  • KarstSentier karstique de Saint-Paul, France
  • SubterraneaCave of Saint Paul the Apostle, Greece
  • KarstSentier karstique de Saint-Pé-de-Bigorre, France
  • MineMusée de la Mine de Saint Pierre La Palud, France
  • SubterraneaGrotte Saint-Remacle, Belgium
  • SubterraneaLes Grandes Caves Saint Roch, France
  • SubterraneaL’Abbaye troglodytique de Saint-Roman, France
  • MineMusée de la Vigne et de la Mine Saint-Rome-de-Tarn, France
  • SpringGouffre de Saint-Sauveur, France
  • CaveGrotte Saint-Vincent, France
  • SubterraneaGrotte de Saint-Vit, France
  • SubterraneaSaitobaru Burial Mounds, Japan
  • KarstSai Yok Noi Waterfall, Thailand
  • GorgeSaklıkent Kanyonu, Turkey
  • MineSala Silvergruva, Sweden
  • KarstSalajõe Karst Area, Estonia
  • CaveGrutas de Salamanca, Uruguay
  • ShowcaveGrotte de la Salamandre, France
  • SubterraneaLa Salata Necropoli Paleocristiana, Italy
  • MineMusée du Sel et des Traditions Béarnaises, France
  • GorgeGole del Salinello, Italy
  • MineGrande Saline de Salins-les-Bains, France
  • GorgeGruta do Salitre, Brazil
  • CaveŠalitrena Pećina, Serbia
  • MineMuseo de Sitio Oficinas Salitreras Humberstone y Santa Laura, Chile
  • GorgeSalpa-Suppa, Finland
  • MineMine d’Or de Salsigne, France
  • KarstSalt Goddess, Iran
  • CaveSalto El Sapo, Venezuela
  • CaveSalto Suizo, Paraguay
  • CaveSalt Pond Cave, Bahamas
  • SpringSalt Springs Recreation Area, United States of America
  • SubterraneaYe Olde Salutation Inn, Great Britain
  • SubterraneaSt. Salvator, Germany
  • SpringSalzaspring, Germany
  • GorgeSalzachöfen, Austria
  • MineSalzwelten Salzburg, Austria
  • CaveTham Sam, Thailand
  • SubterraneaSamangala Ancient Cave Temple, Sri Lanka
  • GorgeSamaria Gorge, Greece
  • ShowcaveSamograd Špilja - Samograd Cave, Croatia
  • CaveSamograd Špilja, Croatia
  • SpringSa Morakot, Thailand
  • MineGrube Samson, Germany
  • CaveSamwel Cave, United States of America
  • SubterraneaRestaurant Cova Sa Nacra, Spain
  • CaveTúnel de San Adrian, Spain
  • MineMiniera Sant’Aloisio, Italy
  • ShowcaveCueva de San Ambrosio, Cuba
  • ShowcaveSanbang Gul, South Korea
  • CaveEremo di San Bartolomeo in Legio, Italy
  • CaveSan Carlos Cave, The Philippines
  • SubterraneaEremo di San Cataldo, Italy
  • CaveEremo di S. Colombano, Italy
  • SubterraneaL’Eremo di S. Corrado Fuori le Mura, Italy
  • CaveSand Cave, United States of America
  • CaveSpilja Šandalja, Croatia
  • ShowcaveSandanbeki Dokutsu, Japan
  • CaveSandbalmhöhle, Switzerland
  • CaveSandia Cave, United States of America
  • SubterraneaPodziemna Trasa Turystyczna w Sandomierzu, Poland
  • CaveSand Cave, United States of America
  • CaveCueva San Elias, Spain
  • SubterraneaChiesa di San Filippo Apostolo, Italy
  • SubterraneaGrotta San Francesco, Italy
  • SubterraneaCistern of the Convent of San Francesco, San Marino
  • SubterraneaChiesa di San Gaetano alle Grotte, Italy
  • SubterraneaCatacombe di San Gaudioso, Italy
  • SubterraneaCatacombe di San Gennaro, Italy
  • ShowcaveGrotta di S. Giovanni di Domusnovas, Italy
  • ShowcaveSan Giovanni d’Antro, Italy
  • SubterraneaCatacombe di San Giovanni, Italy
  • SubterraneaSangtarashan Cave, Iran
  • KarstCenote San Ignacio, México
  • SubterraneaCueva de San Ignacio, Spain
  • SubterraneaTúnel de la Iglesia San Ignacio de Loyola, Argentina
  • SubterraneaSan Jaun de las Aguas, Nicaragua
  • MineSan José Silver Mine, Bolivia
  • ShowcaveGruta de San Jose, Spain
  • MineMina San Jose, Chile
  • SubterraneaSan Juan de la Peña, Spain
  • SubterraneaEremo di San Leonardo, Italy
  • SubterraneaSan Lorenzo Maggiore, Italy
  • SubterraneaL-Għar ta´San Martin, Malta
  • SubterraneaLocanda di San Martino, Italy
  • ShowcaveSanmenhai Water Caves, China
  • SubterraneaSanmenxia Yaodong, China
  • CaveGrotta di San Michele, Italy
  • CaveGrotta di S.Michele Arcangelo, Italy
  • CaveGrotta San Michele, Italy
  • CaveGrotta di San Michele, Italy
  • CaveGrotta dell’Angelo, Italy
  • CaveGrotta San Michele, Italy
  • CaveGrotta di San Michele Arcangelo, Italy
  • CaveGrotta di San Michele, Italy
  • CaveEremo di San Michele di Montenero, Italy
  • CaveSan Michele delle Grotte, Italy
  • CaveSan Michele, Italy
  • CaveSan Michele Arcangelo, Italy
  • CaveSantuario San Michele, Italy
  • CaveGrotta di San Michele Arcangelo, Italy
  • CaveSanmin Bat Cave, China
  • ShowcaveCuevas de San Miquel, Cuba
  • SubterraneaChiesa Rupestre di S. Nicola, Italy
  • SubterraneaChiesa Rupestre di San Nicolò Inferiore, Italy
  • CaveWadi Sannur Cave, Egypt
  • ShowcaveGruta San Pedro, Bolivia
  • SubterraneaBodegas Carlos San Pedro Perez de Viñaspre, Spain
  • SubterraneaSan Pietro Barisano, Italy
  • SubterraneaSan Pietro Barisano Residence e Ristorante, Italy
  • KarstSanqiao Tiankeng, China
  • SubterraneaCisterna de San Roque, Spain
  • ShowcaveSan Sebastián de las Grutas, México
  • MineParco Archeominerario di San Silvestro, Italy
  • ShowcaveCova Santa, Spain
  • ShowcaveGrotta di Santa Barbara, Italy
  • SubterraneaChiese Rupestri di Santa Barbara, Italy
  • CaveCueva Grande de Santa Catalina, Cuba
  • SubterraneaCatacomba di Santa Caterina d’Alessandria, Italy
  • SubterraneaSanta Caterina del Sasso, Italy
  • CaveSanta Caverna, Paraguay
  • ShowcaveGrotte di Santa Croce, Italy
  • MineMuseo delle Miniere Santa Fiora, Italy
  • SubterraneaMazmorras de la Posada de la Santa Hermandad, Spain
  • CaveCova Hospital de Santa Llúcia, Spain
  • SubterraneaChiesa di Santa Lucia alle Malve, Italy
  • SubterraneaCatacomba di Santa Lucia, Italy
  • CaveSanta Maria della Nova, Italy
  • SubterraneaSanta Maria de Idris, Italy
  • SubterraneaCatacomba di Santa Mustiola, Italy
  • CaveCaverna Santana, Brazil
  • SubterraneaMuseo Regional de Prehistoria y Arqueología, Spain
  • CaveGrotta di Sant’Angelo Muxaro, Italy
  • ShowcaveGrotta di Sant’Angelo, Italy
  • CaveSant’Angelo in Vetulis, Italy
  • CaveSant’Angelo, Italy
  • CaveMonte Sant’Angelo, Italy
  • CaveSant’Angelo Le Ripe, Italy
  • CaveGrotta Sant’Angelo, Italy
  • CaveGrotta di Santa Ninfa, Italy
  • SubterraneaSantaPark, Finland
  • SubterraneaSanta Prisca Mithraeum, Italy
  • MineMina de Ouro Santa Rita, Brazil
  • CaveGruta Santa Rita, Brazil
  • CaveSanta Rosa Lava Tubes, Ecuador
  • KarstSanta Rosa Blue Hole, United States of America
  • SubterraneaSantuario di Santa Rosalia, Italy
  • SubterraneaCava de Sant Blai, Spain
  • CaveSant Gregori de Falset, Spain
  • ShowcaveCueva de Santián, Spain
  • SubterraneaSantica, Japan
  • ShowcaveCueva de Santimamiñe, Spain
  • CaveLa Cova de Sant Martí, Spain
  • SubterraneaMonastery of Sant Miquel del Fai, Spain
  • CaveGrutas de Santo-Adriao, Portugal
  • ShowcaveGrutas de Santo-António, Portugal
  • SubterraneaSantoCaves, Greece
  • SubterraneaCueva del Santo Hermano Pedro, Spain
  • CaveSanto Niño Cave, The Philippines
  • CaveEremo di Sant’Onofrio, Italy
  • CaveEremo di Sant’Onofrio al Morrone, Italy
  • ShowcaveLa Gran Caverna de Santo Tomás, Cuba
  • CaveHuella de Santo Tomás, Paraguay
  • SubterraneaCatacumbas do Santuário do Caraça, Brazil
  • KarstPozzo Santullo, Italy
  • ShowcaveSanyou Dong, China
  • ShowcaveCueva de Sao Corona, Cuba
  • MineMina de São Domingos, Portugal
  • ShowcaveGruta São Mateus, Brazil
  • ShowcaveGrutas de São Miguel, Brazil
  • MineSaoner Mine No 1, India
  • ShowcaveGruta de São Thomé, Brazil
  • ShowcaveGrutas de São Vicente, Portugal
  • GorgeSapadere Kanyon, Turkey
  • CaveSapara Altagna, France
  • CaveGrotte a Sapara di Circinellu, France
  • SubterraneaSerapeum of Saqqara, Egypt
  • SubterraneaSarajevski Tunel Spasa, Bosnia and Herzegovina
  • SubterraneaSaratlı Kırkgöz Yeraltı Şehri, Turkey
  • SubterraneaTroglodytes & Sarcophages, France
  • ShowcaveGrotte Prehistorique de Sare, France
  • ShowcaveSarıkaya Mağarası, Turkey
  • SubterraneaŠarišská galéria Prešov, Slovakia
  • SubterraneaShpella e Sari Salltikut, Albania
  • CaveŠarkania diera, Slovakia
  • SubterraneaSarnıç, Turkey
  • SubterraneaSa Rocca, Italy
  • CaveSaruta-do, Japan
  • SpringSarva Spring Lake, Russia
  • ShowcaveCuves de Sassenage, France
  • SubterraneaHotel Sassi, Italy
  • CaveGrotta del Sassocolato, Italy
  • CaveGrotta del Sasso Petruccio, Italy
  • GorgeSasso Spaccato, Italy
  • KarstSatani Kamurj, Armenia
  • ShowcaveSataplia Cave, Georgia
  • CaveGrotta di Sataría, Italy
  • CaveSátorkőpusztai-barlang, Hungary
  • SubterraneaMoravský sklípek, Czech Republic
  • MineSatoyama Mirai Museum, Japan
  • CaveSatsurblia Cave, Georgia
  • SpringTerme di Saturnia, Italy
  • ShowcaveCueva de Saturno, Cuba
  • ShowcaveGrottes de Saulges, France
  • CaveSauta Cave, United States of America
  • SubterraneaChampignonnière du Saut-aux-Loups, France
  • SpringSlap Savice, Slovenia
  • ShowcaveGrottes de Savonnieres, France
  • CaveSawa-i-Lau Caves, Fiji
  • MineSawahlunto Coal Mine Museum, Indonesia
  • CaveSawney Bean’s Cave, Great Britain
  • ShowcavePeştera Scarisoara, Romania
  • ShowcaveScenic Caves, Canada
  • SubterraneaFort du Scex, Switzerland
  • KarstThemenweg Unterirdische Schandtauber, Germany
  • MineGrube Schauinsland, Germany
  • ShowcaveSchellenberger Eishöhle, Germany
  • SubterraneaSchere Complex, Malta
  • CaveSchermerhorn Cave, United States of America
  • ShowcaveSchertelshöhle, Germany
  • CaveScheukofenhöhle, Austria
  • SubterraneaAtlantikwall Museum Scheveningen, Netherlands
  • SubterraneaSchiele Museum of Natural History, United States of America
  • ShowcaveSchillathöhle, Germany
  • CaveSchillerhöhle, Germany
  • MineMiniera Schilpario, Italy
  • CaveSchinderhanneshöhle, Germany
  • CaveSchinderhanneshöhle - Berger Wacken, Germany
  • MineMuseum Uranbergbau Schlema, Germany
  • SubterraneaSchloß Stein, Germany
  • SpringSchmiechquelle, Germany
  • KarstSchmiecher See, Germany
  • MineSchmittenstollen, Germany
  • MineSchmutzlerzeche, Germany
  • CaveSchneckenloch, Austria
  • MineSchneeberg Passeier, Italy
  • MineGrube Segen-Gottes Schnellingen, Germany
  • GorgeSchöllenenschlucht, Switzerland
  • SubterraneaHöhlenmuseum Schönbergalm, Austria
  • SubterraneaFort de Schoenenbourg, France
  • SubterraneaGrottes Schoenfels, Luxembourg
  • MineScholmzeche - Aufrichtigkeit, Germany
  • KarstSchopflocher Moor, Germany
  • SubterraneaSchuilen in Maastricht, Netherlands
  • ShowcaveGroßes Schulerloch, Germany
  • SubterraneaSchwandorfer Felsenkeller, Germany
  • MineBergbaumuseum Schwarzer Crux, Germany
  • GorgeSchwarzwassergraben, Switzerland
  • KarstSchwarzwasserhöhle, Austria
  • MineSchwazer Silberbergwerk, Austria
  • GorgeSchwedenlöcher, Germany
  • MineSaline Schweizerhalle, Switzerland
  • CaveGrotte di Sciacca, Italy
  • CaveGrotte Scladina, Belgium
  • SubterraneaScotland’s Secret Bunker, Great Britain
  • SubterraneaScott’s Grotto, Great Britain
  • MineNational Mining Museum Scotland, Great Britain
  • SubterraneaCaverne Sculptée, France
  • CaveSculptor’s Cave, Great Britain
  • MineBergbau und Bären Museum Schmelzra, Switzerland
  • CaveLa grotte du Sdragonatu, France
  • ShowcaveSea Lion Caves, United States of America
  • SubterraneaMasjid al-Ruqood al-Sebaa, Tunisia
  • ShowcaveSecret Caverns, United States of America
  • SubterraneaSecrets of Underground Odessa, Ukraine
  • SubterraneaKostnice v Sedlci, Czech Republic
  • CaveSedom Cave, Israel
  • CaveSeefeldhöhle, Switzerland
  • MineSeegrotte, Austria
  • ShowcaveSegeberger Kalkberghöhle, Germany
  • MineSegen-Gottes-Erbstolln, Germany
  • SubterraneaGrotta di Seiano, Italy
  • CaveSeikoen Lava Tube, Japan
  • CaveSeiryu Cave, Japan
  • GorgeSeisenbergklamm, Austria
  • ShowcaveSekigahara dai-shonyudo, Japan
  • SubterraneaSelçuklu Evi, Turkey
  • MineSeldom Seen Tourist Coal Mine, United States of America
  • CaveSeljalandsfoss, Iceland
  • CaveSelman Bat Cave, United States of America
  • CaveCuevas de Semán, Venezuela
  • KarstSemuc Champey, Guatemala
  • ShowcaveSenbutsu-do, Japan
  • ShowcaveSeneca Caverns, United States of America
  • ShowcaveSeneca Caverns, United States of America
  • ShowcaveSpilaio Sphentoni, Greece
  • SubterraneaSeokguram Grotto, South Korea
  • ShowcaveSeongnyu Gul, South Korea
  • ShowcaveGoa Seplawan, Indonesia
  • SubterraneaSeppun Tunnel, Japan
  • ShowcaveCrystal Cave, United States of America
  • ShowcaveSequoyah Caverns, United States of America
  • MineMuseo del Carbone della Grande Miniera di Serbariu, Italy
  • SubterraneaSerbian Underground Church, Australia
  • SubterraneaSerdika Metro Station, Bulgaria
  • SubterraneaŞerefiye Sarnıçı, Turkey
  • CaveGrotte du Sergent, France
  • SubterraneaSerinn, Turkey
  • ShowcaveCoves Prehistòriques de Serinyà, Spain
  • SubterraneaLourdes Grotto, Aruba
  • CaveCueva de las Serpientes Colgantes, México
  • CaveSerra da Capivara National Park, Brazil
  • MineMina del Serranillo, Spain
  • CaveSesalačka Pećina, Serbia
  • MineMiniera d’Oro di Sessa, Switzerland
  • SubterraneaSetenil de las Bodegas, Spain
  • CaveSetergrotta, Norway
  • MineSetesdal Mineral Park, Norway
  • CaveCuevas de Se’tzol, Guatemala
  • SubterraneaTomb of Seuthes III, Bulgaria
  • SubterraneaSeven Springs Tunnel, Greece
  • CaveSpilia Epta Parthena, Greece
  • KarstSewanee Natural Bridge, United States of America
  • SubterraneaSextantio Albergo Diffuso Le Grotte Della Civita, Italy
  • GorgeGorges du Seyon, Switzerland
  • ShowcaveGrotte et cascade de Seythenex, France
  • KarstLago Sfondato, Italy
  • ShowcaveBuchan Caves - Shades Of Death Cave, Australia
  • SubterraneaShah Allah Ditta Caves, Pakistan
  • ShowcaveShanidar Cave, Iraq
  • ShowcaveShanjuan Dong, China
  • CaveShankargarh Caves, India
  • CaveShapoor, Iran
  • ShowcaveSharenka Cave, Bulgaria
  • ShowcaveSharkova Dupka Cave, North Macedonia
  • SubterraneaSkalen Manastir Shashkanite, Bulgaria
  • ShowcaveShawnee Cave Amphitheatre, United States of America
  • MineSheffield Mine, United States of America
  • KarstShegeng Through Cave, China
  • SubterraneaThe Shelter, China
  • SubterraneaShelter No. 20, Japan
  • SubterraneaShem Va’Ever Cave, Israel
  • ShowcaveShenandoah Caverns, United States of America
  • SubterraneaShengjinkou, China
  • ShowcaveShenyang Shui Dong, China
  • SubterraneaShepan Island Quarry, China
  • SubterraneaShesh Badgir Ab Anbar, Iran
  • CaveShetani Caves, Kenya
  • ShowcaveShihuadong, China
  • KarstShikoku Karst Natural Park, Japan
  • KarstBig & Small Stone Forest, China
  • SubterraneaShimao Wonderland Hotel, China
  • ShowcaveShimoni Caves, Kenya
  • CaveShimshon Cave, Israel
  • CaveShimuku Gama Cave, Japan
  • ShowcaveShirataki shonyudo, Japan
  • CaveShishi Gongen, Japan
  • CaveShitodo, Japan
  • CaveShivthar Ghal, India
  • ShowcaveShizidong, China
  • ShowcaveShizushi-do, Japan
  • CaveShobu Cave, Japan
  • ShowcaveShoryu-do, Japan
  • ShowcaveShoshone Ice Caves, United States of America
  • SubterraneaShow Cave Night Gallery, United States of America
  • KarstShrimp Hole, Bahamas
  • ShowcaveShuanghe Water Cave, China
  • ShowcaveShuanglong Cave, China
  • KarstShuicheng Natural Bridge, China
  • SubterraneaShui Lian Dong, China
  • CaveShui Lian Dong, China
  • ShowcaveHuangguoshu Waterfall Water Curtain Cave, China
  • ShowcaveShui Lian Dong, China
  • ShowcaveShuiyuan Cave, China
  • ShowcaveShulgan-Tash (Kapova) Cave, Russia
  • SubterraneaShunt, Great Britain
  • CaveShwe Kyar Pwint Cave, Myanmar
  • ShowcaveShwe Oo Min Cave, Myanmar
  • CaveCueva Sia Sia, Perú
  • MineSibaysky Open Pit, Russia
  • SubterraneaSibbergroeve, Netherlands
  • SubterraneaThe Cave Šibenik, Croatia
  • SubterraneaGrotta della Sibilla di Marsala, Italy
  • MineMusée de la Sidérurgie, de la Mines et la Minéralogie, France
  • CaveSieben-Täler-Höhle, Germany
  • CaveSiegfriedhöhle, Germany
  • MineMiniera del Siele, Italy
  • MineSierra Silver Mine Tour, United States of America
  • CaveSierra Cave, The Philippines
  • KarstVodopad Siga, Serbia
  • GorgeValea Sighiştelului, Romania
  • CaveSigiriya, Sri Lanka
  • GorgeSigmund Thun Klamm, Austria
  • ShowcaveSite néolithique de Sigoniac, France
  • KarstSikia Cave, Greece
  • KarstSilathoranam, India
  • MineSchaubergwerk Silberberg, Switzerland
  • MineSilbergründle, Germany
  • MineGrube Silberhardt, Germany
  • GorgeSilberkarklamm, Austria
  • MineSilberseestollen, Germany
  • CaveCuevas de Silencio, Cuba
  • ShowcaveSilicka Ladnica Jaskyna, Slovakia
  • SubterraneaSilkeborg Bunker Museum, Denmark
  • CaveSilop Caves, The Philippines
  • ShowcaveGuha Siluman, Indonesia
  • MineÖstra Silvberg gruva, Sweden
  • ShowcaveSilver Cave, China
  • SpringSilver Springs Nature Park, United States of America
  • SubterraneaSilver Stream Cave, China
  • SubterraneaLondon Silver Vaults, Great Britain
  • MineSimpson Copper Mineshaft, Canada
  • SubterraneaSimserhof, France
  • CaveTham Sin, Thailand
  • SubterraneaPeştera mănăstire de la Sinca Veche, Romania
  • KarstSinks Canyon State Park, United States of America
  • SpringSintzi Spring, Greece
  • CaveSipahiler Mağarası, Turkey
  • CaveSipja Donggul, South Korea
  • CaveŠipka jeskyně, Czech Republic
  • ShowcaveŠpilja Šipun, Croatia
  • SubterraneaSiracourt VI Storage Bunker, France
  • CaveSirgensteinhöhle, Germany
  • KarstLago Sirino, Italy
  • ShowcaveSitting Bull Crystal Cave, United States of America
  • CaveSitton’s Cave, United States of America
  • SubterraneaSivasa Gökçetoprak Yeraltı Şehri, Turkey
  • ShowcaveSiviri Caves, Vanuatu
  • CaveSixtus Lodge Glow Worm Cave, New Zealand
  • CaveCave of Skalia, Greece
  • CaveSkalky skřítků, Czech Republic
  • CaveSkallbergsgrottan, Sweden
  • CaveSkaren-Monsen caves, Norway
  • GorgeJättegrytan i Skarpnäck, Sweden
  • CaveSkeleton Cave, United States of America
  • ShowcaveSkelsky Pestera, Russia
  • SubterraneaSki Dubai Ice Cave, United Arab Emirates
  • CaveSkirwith Cave, Great Britain
  • ShowcaveSkocjanske Jame, Slovenia
  • MineSkottvångs Gruva, Sweden
  • SubterraneaSkt. Laurentius, Denmark
  • CaveSkull Cave, Cayman Islands
  • ShowcaveSkyline Cavern, United States of America
  • MineSlănic Mine, Romania
  • CaveSlaughter Canyon Cave, United States of America
  • GorgeSlavinjsko Grlo, Serbia
  • MineSlotterberget, Sweden
  • ShowcaveSlough Caverns, Great Britain
  • ShowcaveSloupsko-sosuvske jeskyne, Czech Republic
  • KarstSlunj Rastoke, Croatia
  • ShowcaveSmall Dragon Cave, South Korea
  • ShowcaveSmallin Cave, United States of America
  • SpringSmardonės šaltinis, Lithuania
  • SubterraneaSMART Tunnel, Malaysia
  • ShowcaveGrotta dello Smeraldo, Italy
  • ShowcaveSmocza Jama, Poland
  • CaveJaskinia Smocza Jama w Wąwozie Kraków, Poland
  • ShowcaveSmoke Hole Caverns, United States of America
  • ShowcaveSmoo Cave, Great Britain
  • KarstSmrekova Draga, Slovenia
  • MineSmuggler Mine and Compromise Mine, United States of America
  • CaveSmuggler’s Cave, Bahamas
  • MineSnailbeach Lead Mine, Great Britain
  • SubterraneaPivnice U Šneka, Czech Republic
  • ShowcaveSnežanka Peštera, Bulgaria
  • ShowcaveSnezna Jama, Slovenia
  • CaveSnib’s Cave, Great Britain
  • MineSnibston Discovery Museum, Great Britain
  • MineSnow Lake Mining Town Museum, Canada
  • SubterraneaSnowy Mountains Hydro-electric Scheme, Australia
  • SubterraneaSociété des Caves de Roquefort, France
  • SubterraneaM/S Museet for Søfart, Denmark
  • ShowcaveSof Omar, Ethiopia
  • ShowcaveGrotte del Sogno, Italy
  • KarstSohoton Natural Bridge, The Philippines
  • ShowcaveSohoton Cave, The Philippines
  • ShowcaveSokolačka Pećina, Bosnia and Herzegovina
  • MineSoledar Salt Mine, Ukraine
  • MineSoligorsk Salt Mine, Belarus
  • MineSolivar v Prešove, Slovakia
  • SubterraneaKing Solomon’s Quarries, Israel
  • MineSolotvyno, Ukraine
  • MineSolvayovy Lomy, Czech Republic
  • CaveSolymári ördöglyuk-barlang, Hungary
  • SubterraneaMusée Somme 1916, France
  • MineKupferbergwerk Grube Wilhelmine Sommerkahl, Germany
  • SubterraneaSon Bhandar Caves, India
  • MineErlebnisbergwerk Sondershausen, Germany
  • CaveHang Son Doong, Vietnam
  • ShowcaveSong-am Donggul, North Korea
  • CaveSönghellir, Iceland
  • SubterraneaSong Unsa Temple, South Korea
  • ShowcaveSon Moc Huong Cave, Vietnam
  • ShowcaveCaverns of Sonora, United States of America
  • SubterraneaArizona-Sonora Desert Museum, United States of America
  • CaveCueva de S’avenc de Son Pou, Spain
  • ShowcaveSontheimer Höhle, Germany
  • CaveHang Sơn Trà, Vietnam
  • ShowcaveCueva de Sopeña, Spain
  • ShowcaveSophienhöhle, Germany
  • ShowcaveCueva El Soplao, Spain
  • MineSopron Bányászati Múzeum, Hungary
  • SubterraneaBunker Soratte, Italy
  • CaveCuevas de Sorbas, Spain
  • ShowcaveGrotte du Sorcier, France
  • ShowcaveSorek Cave, Israel
  • KarstSentier karstique de Sorèze, France
  • CaveGrotte Sorte Gryde, Denmark
  • SubterraneaSötétkapu, Hungary
  • MineMuseo Arte Contemporanea Sotto Sale, Italy
  • MineSoudan Underground Mine, United States of America
  • CaveLa Grotte de Soustelle, France
  • MineSouterroscope des Ardoisières, France
  • MineSouth Crofty Mine, Great Britain
  • ShowcaveSouth Glory Cave, Australia
  • CaveSouth Ice Cave, United States of America
  • MineSouth Wales Miners’ Museum, Great Britain
  • SubterraneaParcours Troglodytique Souzay-Champigny, France
  • ShowcaveGrottes prehistoriques de Soyons, France
  • MineMúzeum medi v Španej Doline, Slovakia
  • ShowcaveSpannagelhöhle, Austria
  • CaveSpar Cave, Great Britain
  • ShowcaveŠparožna Jama, Croatia
  • MineSparwood Mine Tours, Canada
  • SubterraneaSpa Terra, United States of America
  • SubterraneaSpeakeasy 518, United States of America
  • CaveSpeco di San Francesco, Italy
  • MineSpectrum Mines, Australia
  • MineSpectrum Sunstone Mine, United States of America
  • ShowcaveSpeedwell Cavern, Great Britain
  • ShowcaveSpellbound Glowworm Cave, New Zealand
  • SubterraneaCastello di Sperlinga, Italy
  • SubterraneaFestungsmuseum Sperre Trin, Switzerland
  • MineSperrgebiet National Park, Namibia
  • CaveSpider Cave, United States of America
  • MineLes minières de silex néolithique de Spiennes à Mons, Belgium
  • SubterraneaSpilia Caves Santorini, Greece
  • CaveGrotta della Spipola, Italy
  • CaveSpirit Mountain Cave, United States of America
  • MineExpozícia História Baníctva na Spiši, Slovakia
  • KarstSpittal Pond Nature Reserve, Bermuda
  • GorgeSpitzenbachklamm, Austria
  • CaveSplidfrik Cave, Molvanîa
  • MineSpokane Bar Sapphire Mine, United States of America
  • ShowcaveSpook Cave, United States of America
  • CaveSpouting Horn, United States of America
  • CaveSpring Cave, United States of America
  • KarstNatural Bridge Springbrook, Australia
  • ShowcaveSpring Mill State Park, United States of America
  • CaveLa Grotte de Spy, Belgium
  • CaveSquaw Cave, United States of America
  • ShowcaveSquire Boone Caverns & Village, United States of America
  • KarstSri Nakarin Dam, Thailand
  • SubterraneaStadshuskällaren, Sweden
  • SubterraneaSt Agatha’s Catacombs, Malta
  • ShowcaveStagebarn Crystal Cave, United States of America
  • SubterraneaStaglin Family Vineyard, United States of America
  • MineStahlberger Erbstollen, Germany
  • CaveStalbitsata Cave, Bulgaria
  • SubterraneaStalin’s Bunker, Russia
  • SubterraneaStandedge Tunnel, Great Britain
  • SubterraneaSt Andrew’s Hall Undercroft, Great Britain
  • ShowcaveStanišovská jaskyňa, Slovakia
  • MineStanley Mine on Fisher Mountain, United States of America
  • MineSt. Anna Fundgrube, Germany
  • SpringSt Anthony’s Well, Great Britain
  • SubterraneaPeștera Sfântului Antonie de la Iezer, Romania
  • GorgeStará Plynárna, Czech Republic
  • SubterraneaStar Cave Hotel, Turkey
  • ShowcaveStark Caverns, United States of America
  • MineŠtola Starý Martin, Czech Republic
  • GorgeStarzlachklamm, Germany
  • CavePesterna Crkva Sveti Atanasie, North Macedonia
  • ShowcaveSt Blaize Cave, South Africa
  • MineGrubenanlage "St. Briccius", Germany
  • MineBesucherbergwerk „St.-Christoph“, Germany
  • SubterraneaHermitage of St. Cirijaka, Croatia
  • CaveSt. Colman’s Cell, Ireland
  • CaveSt. Columba’s Cave, Great Britain
  • KarstSt Cuthbert’s Swallet, Great Britain
  • CaveSteam and Bat Caves, Vanuatu
  • MineSteenkolenmijn Valkenburg, Netherlands
  • SubterraneaŠtefanova Vinska Klet, Slovenia
  • ShowcaveTham Le Stegodon, Thailand
  • MineLa mine St Nicolas à Steinbach, France
  • MineHeimat- und Braunkohlemuseum Steinberg am See, Germany
  • CaveSteinernes Haus, Germany
  • MineBergbaumuseum Steinhaus, Italy
  • MineHistorische Edelsteinminen im Steinkaulenberg, Germany
  • CaveSteinkirche, Germany
  • GorgeSteinwandklamm, Austria
  • SubterraneaStollenanlagen am Stephansberg, Germany
  • CavePesterna Crkva Sveti Erazmo, North Macedonia
  • ShowcaveSterkfontein Caves, South Africa
  • MineSterling Hill Mining Museum, United States of America
  • KarstStevens Twin Sinks Preserve, United States of America
  • SubterraneaKoldkrigsmuseum Stevnsfort, Denmark
  • SubterraneaSt. George Monastery, Israel
  • MineSt. Gideon Erbstollen, Germany
  • SubterraneaPeștera Sfântului Grigorie Decapolitul, Romania
  • MineSt. Helena Gold Mine, South Africa
  • CaveSt. Herman’s Cave, Belize
  • ShowcaveStick-Tomato Cave, Australia
  • ShowcaveLa Grotta di Stiffe, Italy
  • ShowcaveSt. John Mine, United States of America
  • SubterraneaSt. Joseph’s Church, Israel
  • MineSt. Lampertus Fundgrube, Germany
  • ShowcaveGrotte de Saint-Marcel d’Ardèche, France
  • SubterraneaSt Margaret’s Cave, Great Britain
  • SubterraneaCaves St. Martin, Luxembourg
  • SubterraneaAziz Mercurius Yeraltı Şehri ve Kilisesi, Turkey
  • CavePesterna Crkva Sveti Arhangel Mihail, North Macedonia
  • ShowcaveSt. Michael’s Caves, Great Britain
  • MineBesucherbergwerk Stock und Scherenberger Erbstollen, Germany
  • CaveStockyard Gully Cave, Australia
  • MineStollbergs Gruvor, Sweden
  • MineLa Mine de Cuivre et le Musée Koffergrouf, Luxembourg
  • SubterraneaStone Cavehouse Hotel, China
  • KarstStone Garden, Nepal
  • ShowcaveStopića Pećina, Serbia
  • MineStorbergets gruvor, Sweden
  • SpringStore Blåkilde, Denmark
  • CaveStorrisbergsgrottorna, Sweden
  • MineStorwartz, Norway
  • SubterraneaThe Story of Berlin, Germany
  • CaveSt Paul Subterranean River National Park, The Philippines
  • SubterraneaSt Paul’s Catacombs, Malta
  • SubterraneaSt Paul’s Grotto, Malta
  • CaveChapel of St. Paul the Hermit, Malta
  • CaveGrotto of St. Peter in Antioch, Turkey
  • SubterraneaHermitage of St. Peter of Koriša, Serbia
  • SubterraneaSt Peter’s Bunker Museum, Great Britain
  • SubterraneaGrotten St. Pietersberg, Netherlands
  • SubterraneaStradetska Pestera, Ukraine
  • ShowcaveStrašínská jeskyne, Czech Republic
  • ShowcaveŠpilja Strašna Peć, Croatia
  • SubterraneaStředověká Krčma, Czech Republic
  • SubterraneaArchaeological Level of St. Sophia Basilica, Bulgaria
  • CavePesterna Crkva Sveti Stefan, North Macedonia
  • SubterraneaEisgrotte Stubaier Gletscher, Austria
  • ShowcaveStump Cross Caverns, Great Britain
  • ShowcaveSturmannshöhle, Germany
  • KarstLimni Stymphalia, Greece
  • CaveWat Tham Sua, Thailand
  • SubterraneaSubmarine Tunnel, Montenegro
  • SubterraneaSubterranean Seattle, United States of America
  • SubterraneaSubTropolis, United States of America
  • GorgeThe Subway, United States of America
  • CaveSubway Cave, United States of America
  • GorgeRokle Suchá Belá, Slovakia
  • MineSudbury Mining Museum, Canada
  • ShowcaveSuddah Guffa, Nepal
  • ShowcaveSudwala Caves, South Africa
  • ShowcaveSueva Dupka, Bulgaria
  • ShowcavePeştera Şugău, Romania
  • MineSilberbergwerk Suggental, Germany
  • CaveSugomak Pestera, Russia
  • SpringAgua Sulfurosa, Perú
  • MineSulitjelma Besøksgruver, Norway
  • KarstSúľovské Skaly, Slovakia
  • MineBergbaumuseum Sulzburg, Germany
  • CaveSumaging, The Philippines
  • ShowcaveSu Mannau Grotte, Italy
  • ShowcaveGrotta di Su Marmuri, Italy
  • SubterraneaSümela Manastırı, Turkey
  • CaveGruta do Sumidouro, Brazil
  • CaveSumiyoshi Ankawa, Japan
  • MineSchaubergwerk Sunfixl-Höhle, Austria
  • MineSungai Lembing, Malaysia
  • ShowcaveHang Sung Sôt, Vietnam
  • MineSchaubergwerk Sunnpau, Austria
  • ShowcaveSunny Jim Cave, United States of America
  • KarstSuogeyicun, China
  • MineThe Super Pit Lookout, Australia
  • KarstŠuplja Greda, Croatia
  • CaveSurtshellir-Stefánshellir system, Iceland
  • CaveSuse Jaana Cave, Japan
  • CaveSusiluola, Finland
  • CaveLas Cuevas de Susmay, Honduras
  • MineSutter Gold Mine, United States of America
  • SubterraneaTham Suwan Kuha, Thailand
  • KarstCenote Suytun, México
  • SubterraneaŠpilja-crkva sv. Ante, Croatia
  • CaveSvarthamarhola, Norway
  • CaveJeskyně Švédův Stůl, Czech Republic
  • SubterraneaGinina Mogila - Thracian Tomb of Sveshtari, Bulgaria
  • ShowcaveSveta Jama, Slovenia
  • SubterraneaIsposnica Svetog Save, Serbia
  • SubterraneaSviatohirsk Lavra, Ukraine
  • CaveJeskyně svatého Ivana, Czech Republic
  • ShowcaveSwahili Cave, Tanzania
  • CaveSwartkrans Cave, South Africa
  • MineSweet Surrender Crystal Mine, United States of America
  • CaveSwiftlet Cave Munnar, India
  • CaveThe Cave of Swimmers, Egypt
  • SubterraneaSyanovskie Quarry, Russia
  • SubterraneaSybil’s Cave, United States of America
  • MineSydvaranger Mine, Norway
  • MineSygun Copper Mine, Great Britain
  • SubterraneaSymposion Cultural Center, Greece
  • ShowcaveSyrauer Drachenhöhle, Germany
  • SpringSyri i kaltër, Albania
  • CaveSzelim-barlang, Hungary
  • ShowcaveSzemlö-Hegy Barlang, Hungary
  • SubterraneaSziklakórház Múzeum, Hungary
  • MineKopalnia Szklary Huta, Poland
  • ShowcaveSzt. István Barlang, Hungary
  • CaveTabashka Cave, Bulgaria
  • MineTabergs gruva, Sweden
  • SubterraneaTa’ Bistra Catacombs, Malta
  • ShowcaveTabon Caves, The Philippines
  • ShowcaveŽupanova Jama - Taborska Jama, Slovenia
  • CaveTham Tab Tao, Thailand
  • MineTaebaek Coal Museum, South Korea
  • CaveTäuferhöhle, Switzerland
  • CaveTaforalt, Morocco
  • SubterraneaBunker GO-42, Russia
  • MineTagawa City Coal and History Museum, Japan
  • SubterraneaRestaurante Tagoror, Spain
  • ShowcaveTaiji Dong, China
  • SubterraneaGrotte Taillerie du Puy de Dôme, France
  • MineTaio Kinzan, Japan
  • GorgeTaishaku Gorge, Japan
  • ShowcaveTaisho-do, Japan
  • SubterraneaChampagne Taittinger, France
  • ShowcaveTaiyi Cave, China
  • MineCoal Museum of China, China
  • KarstLake Taka, Greece
  • GorgeTakachiho Gorge, Japan
  • SubterraneaTake 5 Bar, Great Britain
  • SubterraneaTakkoku no Iwaya Temple, Japan
  • ShowcaveTham Takobi, Thailand
  • SubterraneaTaktsang Dzong, Bhutan
  • SubterraneaGħar tal-Iburdan, Malta
  • KarstTalava Arches, Niue
  • CaveTaldinskij, Russia
  • ShowcaveLas Cuevas de Talgua, Honduras
  • SubterraneaTalijanova Buža, Croatia
  • ShowcaveTalking Rocks Cavern, United States of America
  • SubterraneaTal-Mintna Catacombs, Malta
  • CaveTalofofo Cave, Guam
  • CaveWat Tham Talot, Thailand
  • SubterraneaTamagawa Daishi, Japan
  • CaveTamana Caves, Trinidad and Tobago
  • KarstVai Tamaroa, Cook Islands
  • SubterraneaTamborine Mountain Glow Worm Caves, Australia
  • ShowcaveTam Coc, Vietnam
  • ShowcaveĐộng Tam Cung, Vietnam
  • GorgeTaminaschlucht, Switzerland
  • ShowcaveGrotta della Tanaccia, Italy
  • CaveGoa Tanding, Indonesia
  • ShowcaveGrotta Tanella, Italy
  • KarstVai Tango, Cook Islands
  • CaveCueva en Taninul, México
  • CaveTaniwha Cave, New Zealand
  • SubterraneaTaniwha Cave, New Zealand
  • MineTankavaaran Kultakylässä, Finland
  • MineTankerville Mine, Great Britain
  • MineGrube Tannenberg, Germany
  • ShowcaveTantanoola Cave, Australia
  • ShowcaveTaohuayuan, China
  • SpringTaor Spring, Serbia
  • ShowcaveTaoyuandong, China
  • SubterraneaWat Tham Tapan, Thailand
  • ShowcaveTapolcai Tavasbarlang, Hungary
  • SubterraneaMar Taqla, Syria
  • ShowcaveGrotta Taquisara, Italy
  • SubterraneaTaranto Sotterranea, Italy
  • SubterraneaCueva los Tarantos, Spain
  • SpringTarawera Falls, New Zealand
  • MineSalina Târgu Ocna, Romania
  • GorgeTaroko Gorge, China
  • MineTar Tunnel, Great Britain
  • ShowcaveTaşkuyu Mağarası, Turkey
  • SubterraneaTašmajdanska pećina, Serbia
  • CaveTassili n’Ajjer, Algeria
  • MineBányászati és Ipari Skanzen, Hungary
  • SubterraneaTatlarin Yeraltı Şehri, Turkey
  • SubterraneaGħar Tat-Tramuntana - North Cave, Malta
  • CaveGruta do Tatu, Brazil
  • GorgeTaubenlochschlucht, Switzerland
  • MineTauerngold-Rundwanderweg, Austria
  • ShowcaveCuevas de Taulabé, Honduras
  • MineMines de Fer du Salver sur le Canigou à Taurinya, France
  • KarstTawi Ateer, Oman
  • MineTaxco Silver Mines, México
  • SubterraneaTaya Caves, Japan
  • CaveCueva de los Tayos de Coangos, Ecuador
  • CaveCueva de los Tayos Tayu Jee, Ecuador
  • ShowcaveTazari Caves, Tanzania
  • CaveTeakettle Rock, United States of America
  • ShowcaveTe Anaroa Cave, New Zealand
  • ShowcaveTe Anau Glowworm Caves, New Zealand
  • KarstTeeq Sinkhole, Oman
  • SubterraneaCave Dwellings of Tegh, Armenia
  • MineTekniikan Museo, Finland
  • MineTekniska Museet, Sweden
  • CaveCueva del Oso de Tella, Spain
  • MineTellure, France
  • CaveGoa Tembus Pracimantoro, Indonesia
  • CaveTemiya Cave, Japan
  • ShowcaveTemna Peštera, North Macedonia
  • CaveTemnata dupka, Bulgaria
  • MineLa Mine Témoin, France
  • GorgeVale of Tempe, Greece
  • MineMiniera del Temperino, Italy
  • SubterraneaTemplar Tunnel, Israel
  • MineTemple Mine, Great Britain
  • ShowcaveTemple of Baal Cave, Australia
  • SubterraneaEl Templo del Flamenco, Spain
  • SubterraneaL’Osteria del Tempo Perso, Italy
  • SubterraneaTemppeliaukion kirkko, Finland
  • SubterraneaMonastery of the Temptation, Israel
  • ShowcaveGua Tempurung, Malaysia
  • CaveTen Bay Cave, Bahamas
  • ShowcaveTenglong Dong, China
  • CaveTe’omim Cave, Israel
  • CaveTeorumata Cave, New Zealand
  • CaveTeotihuacán, México
  • CaveAna Te Pahu, Chile
  • SubterraneaTepe-Kermen, Russia
  • CaveAna Te Pora, Chile
  • ShowcaveTera Cave, Japan
  • ShowcaveGua Terang Bulan, Malaysia
  • CaveGoa Terawang, Indonesia
  • CaveSima Terciopelo, Costa Rica
  • SubterraneaLas Termas Romanas, Spain
  • SubterraneaMitreo delle Terme del Mitra, Italy
  • MineTerra Mystica, Austria
  • SubterraneaTerra Vinea, France
  • MineLa maison des Terrils, Belgium
  • MineLes Terrils Jumeaux du 11/19, France
  • ShowcaveGua Terus, Malaysia
  • ShowcaveCueva del Tesoro, Spain
  • GorgeLes Gorges Mystérieuses de Tête Noire, Switzerland
  • ShowcaveTetri Cave, Georgia
  • ShowcaveTham Tet Toong Cave, Vietnam
  • ShowcaveTettyei Mésztufa-barlang, Hungary
  • ShowcaveTeufelshöhle, Germany
  • GorgeTeufelsschlucht, Switzerland
  • ShowcaveTeufelshöhle, Germany
  • MineBesuchsbergwerk Teufelsgrund, Germany
  • GorgeTeufelsschlucht, Germany
  • ShowcaveGrotte de Teyjat, France
  • ShowcaveĐộng Thác Bờ Ngòi Hoa, Vietnam
  • ShowcaveThạch Động, Vietnam
  • ShowcaveGrottes de Thaïs, France
  • Caveþakgilshellir, Iceland
  • MineThames Gold Field, New Zealand
  • ShowcaveTham Thanh Cave, Vietnam
  • ShowcaveTham Than Lot, Thailand
  • CaveTharon Cave, India
  • SubterraneaThe Bunker, Great Britain
  • SubterraneaThe Cave, Indonesia
  • SubterraneaThe Cave Bar, Cyprus
  • ShowcaveThe Caverns, United States of America
  • SubterraneaThe Caves Hotel, Jamaica
  • CaveThe Caves, Bahamas
  • SubterraneaThe Crypt, Great Britain
  • CaveThe Grotto, Thailand
  • KarstPertes de Thémines, France
  • CaveTheopetra Cave, Greece
  • MineGruben- und Feldbahnmuseum Zeche Theresia, Germany
  • GorgeTherissou Gorge, Greece
  • SpringHot Springs State Park, United States of America
  • MineThetford Mines, Canada
  • SubterraneaThe Underground Speakeasy and Distillery, United States of America
  • ShowcaveHang Thiên Cảnh Sơn, Vietnam
  • ShowcaveĐộng Thiên Cung, Vietnam
  • ShowcaveDộng Thiên Cung, Vietnam
  • ShowcaveThien Duong, Vietnam
  • ShowcaveThien Ha Cave, Vietnam
  • CaveHang Thiên Hương, Vietnam
  • ShowcaveĐộng Thiên Long, Vietnam
  • MineLes Hautes-Mynes du Thillot, France
  • MineThingbæk Kalkminer, Denmark
  • MineMusée de la Mine Thio, New Caledonia
  • CaveThor’s Cave, Great Britain
  • CaveThor’s Well, United States of America
  • SubterraneaLe Thot, France
  • ShowcaveGrotte de Thouzon, France
  • MineThree Creeks Gold Mine, Australia
  • ShowcaveThree Eyed Cave, Russia
  • ShowcaveLos Tres Ojos, Dominican Republic
  • SpringThree Sisters Springs, United States of America
  • MineThrelkeld Quarry and Mining Museum, Great Britain
  • ShowcaveThrihnukagigur, Iceland
  • SubterraneaThunder Head Underground Falls, United States of America
  • ShowcaveThurston Lava Tube, United States of America
  • ShowcaveTianbao Cave, China
  • ShowcaveTianlong Ancient Cave, China
  • CaveTianmen Dong, China
  • ShowcaveTianquan Cave, China
  • SubterraneaTianti Grottoes, China
  • ShowcaveTianxing Dong, China
  • GorgeTianyi Lane, China
  • ShowcaveTianzhong Dong, China
  • GorgeTiefenbachklamm, Austria
  • MineTiefer Molchner Stollen, Germany
  • MineTiefer Stollen, Germany
  • ShowcaveĐồng Tiền, Vietnam
  • ShowcaveĐộng Tiên Cá, Vietnam
  • ShowcaveHang Tiên Ông, Vietnam
  • ShowcaveĐộng Tiên Phi, Vietnam
  • ShowcaveDong Tien Son, Vietnam
  • ShowcaveĐộng Tiên Sơn Thanh Hóa, Vietnam
  • CaveTieqa Zera - Azure Window, Malta
  • SubterraneaTiergartentunnel, Germany
  • MineMuseo Minero de Tierra Amarilla, Chile
  • SubterraneaTierradentro Rock Tombs, Colombia
  • CaveTiger Cave, Belize
  • GorgeTiger Leaping Gorge, China
  • CaveCueva del Tigré, Argentina
  • CaveCuevas del Tigre, Guatemala
  • CaveCueva del Tigre, Argentina
  • SubterraneaTihanyi barátlakások, Hungary
  • MineTilas Stoll, Sweden
  • SubterraneaTi Law Ka Guru Cave, Myanmar
  • MineTilden Mine, United States of America
  • SubterraneaTilly Whim Caves, Great Britain
  • SpringSorgenti del Timavo, Italy
  • MineTimmins Underground Gold Mine Tour, Canada
  • CaveTimor Caves, Australia
  • ShowcaveTimpanogos Cave National Monument, United States of America
  • ShowcaveTimubo Cave, The Philippines
  • GorgeTinago Falls, The Philippines
  • ShowcaveCueva de la Tinaja, Spain
  • ShowcaveTinazTepe Mağarları, Turkey
  • GorgeParco Gola del Tinazzo, Italy
  • CaveTinted Cave, Australia
  • CaveTintron Cave Tour, Iceland
  • SubterraneaCasas Cueva del Tio Tobas, Spain
  • CaveTipton-Hayes Farm Cave, United States of America
  • SubterraneaAcropolis of Ancient Tiryns, Greece
  • SubterraneaTiscali, Italy
  • CaveTischofer Höhle, Austria
  • GorgeTiské Stěny, Czech Republic
  • ShowcavePeştera de la Tismana, Romania
  • CaveVentanas de Tisquizoque, Colombia
  • SubterraneaTitan Missile Museum, United States of America
  • SubterraneaGletschergrotte Titlis, Switzerland
  • ShowcaveTito’s Cave, Bosnia and Herzegovina
  • SubterraneaTito’s Bunker, Bosnia and Herzegovina
  • CaveTitova pećina, Montenegro
  • ShowcaveCuevo de Tito Bustillo, Spain
  • CaveTitova Špilja, Croatia
  • SubterraneaTitus Tüneli, Turkey
  • MineToburn Mine, Canada
  • SubterraneaTodi Sotterranea, Italy
  • KarstTogo Chasm, Niue
  • ShowcaveTohma Shonyudo, Japan
  • ShowcaveTohro-no iwaya, Japan
  • MineToi Kinzan, Japan
  • ShowcaveGrotte di Toirano, Italy
  • SubterraneaHistorická Pivnica Tokaj & Co S.R.O., Slovakia
  • CaveTokumoto Shonin’s First Cave, Japan
  • SubterraneaShutoken Gaikaku Hosuiro, Japan
  • ShowcaveGrutas de Tolantongo, México
  • SubterraneaSubterráneos de Toledo, Spain
  • MineCleveland Ironstone Mining Museum, Great Britain
  • MineTomnadashan Mine, Great Britain
  • CaveTom Taylor’s Cave, Great Britain
  • MineTonbergbaumuseum Westerwald, Germany
  • ShowcaveTongshou Mountain, China
  • SubterraneaTonkararin, Japan
  • ShowcaveSpelaio Ton Limnon, Greece
  • MineTonopah Historic Mining Park, United States of America
  • KarstTonto Natural Bridge, United States of America
  • SubterraneaToorji Ka Jhalra Bavdi, India
  • SubterraneaTopolandia, Costa Rica
  • CavePesterii Topolnita, Romania
  • CaveTorghatthullet, Norway
  • CaveTori Hell, Estonia
  • KarstToriike Pond, Japan
  • CaveTorkulla Kyrka, Sweden
  • SubterraneaTörley Pezsgőmanufaktúra, Hungary
  • GorgeQuebrada del Toro, Spain
  • ShowcaveGruta das Torres, Portugal
  • CaveGruta da Torrinha, Brazil
  • ShowcaveGrotta Delle Torri Slivia, Italy
  • CaveAbrigo de Tortosilla, Spain
  • CaveToru a Puru Cave, Cook Islands
  • KarstTo Sua, Samoa
  • ShowcaveTotsui shonyudo, Japan
  • MineTour-Ed Mine, United States of America
  • CaveTouri Cave, Cook Islands
  • ShowcaveGrotte de Tourtoirac, France
  • SubterraneaThe Grottoes of Toyuk, China
  • SubterraneaGrotta delle Trabacche, Italy
  • SubterraneaTraben-Trarbacher Unterwelt, Germany
  • MineMuseo della Miniera Trabia Tallarita, Italy
  • ShowcaveGrottes de Trabuc, France
  • ShowcaveHung Trang An, Vietnam
  • SubterraneaNew York Transit Museum, United States of America
  • MineMina Tránsito, Chile
  • CaveTrapeza Cave, Greece
  • MineMines d’Asphalte Site de la Presta à Travers, Switzerland
  • MineMuseo delle miniere di Traversella, Italy
  • ShowcaveTreak Cliff Cavern, Great Britain
  • SubterraneaCave of Treasures, Israel
  • SubterraneaTreasures in the Walls Museum, Israel
  • KarstTrebišnjica River, Bosnia and Herzegovina
  • SubterraneaTre Buchi, Switzerland
  • SubterraneaTregiffian Burial Chamber, Great Britain
  • MineMusée de l’Ardoise à Trélazé, France
  • CaveGrotta dei Tre Livelli, Italy
  • CaveGrotte di Tremusa, Italy
  • GorgeGorges du Triege, Switzerland
  • GorgeGorges du Trient, Switzerland
  • GorgeTrigrad Gorge, Bulgaria
  • MineCarrière de talc de Trimouns, France
  • ShowcaveHang Trinh Nủ, Vietnam
  • MineTrinidad Mining Museum, United States of America
  • CaveTrio barlang, Hungary
  • SubterraneaBrunnenstollen Trippstadt, Germany
  • SubterraneaTriq Rumana, Malta
  • SubterraneaTroglododo, France
  • SubterraneaTroll Cave, New Zealand
  • CaveTrollegater, Sweden
  • CaveTrollholene, Norway
  • CaveTrollkyrkja, Norway
  • ShowcaveHang Trong, Vietnam
  • SubterraneaVillage Troglodyte de Trôo, France
  • CaveGrotte du Trou de l’Argent, France
  • ShowcaveLe Trou de la Fée, Canada
  • CaveLe Trou du Diable, Canada
  • SubterraneaTrough Creek, United States of America
  • CaveTrout Lake Ice Cave, United States of America
  • SpringTroy Spring, United States of America
  • GorgeTrümmelbachschlucht, Switzerland
  • ShowcaveTruitt’s Cave, United States of America
  • ShowcaveGrotta del Trullo, Italy
  • ShowcaveĐộng Trung Trang, Vietnam
  • MineTsar Asen Mine, Bulgaria
  • SubterraneaTsar’s Mound, Russia
  • ShowcaveTschamberhöhle, Germany
  • GorgeTscheppaschlucht, Austria
  • CaveTsodilo Rock Paintings, Botswana
  • ShowcaveTsutskhvati Cave, Georgia
  • MineT.T. No 5, Malaysia
  • CaveTuatini Cave, Cook Islands
  • CaveTučepska Vilenjača, Croatia
  • ShowcaveTuckaleechee Caverns, United States of America
  • GorgeTukad Cepung Waterfall, Indonesia
  • SubterraneaTulsa Cave House, United States of America
  • ShowcaveTulumtaş Mağarası, Turkey
  • SubterraneaTumbling Creek Cave, United States of America
  • CaveTumbling Creek Cave, United States of America
  • CaveTumbling Rock Cave, United States of America
  • SubterraneaTünel, Turkey
  • CaveLos Tuneles, Colombia
  • SubterraneaTúneles de Buenos Aires, Argentina
  • ShowcaveActun Tunichil Muknal, Belize
  • ShowcaveGrottes des Tunnels, France
  • CaveTunnelgrottor, Sweden
  • SubterraneaTunnel 88, China
  • SubterraneaStockholms Tunnelbana, Sweden
  • CaveTunnel Creek National Park, Australia
  • ShowcaveTunqui Cueva, Perú
  • MineSalina Turda, Romania
  • KarstTurloughmore, Ireland
  • ShowcaveJeskyně na Turoldu, Czech Republic
  • SubterraneaPréhisto Parc, France
  • GorgeHẻm Tu Sản Mã, Vietnam
  • SpringTushemisht Spring, Albania
  • GorgeTusher Tunnel, United States of America
  • CaveTushuk Tash, China
  • KarstGħar Tuta, Malta
  • SubterraneaTuyuq Khojam Mazar, China
  • GorgeTwannbachschlucht, Switzerland
  • CaveTwilight Caverne, Mauritius
  • KarstTwin Arches, United States of America
  • MineTwin Creek Crystal Mine, United States of America
  • MineErdöl-Erdgas-Museum Twist, Germany
  • CaveTwo Foot Bay Cave, Antigua & Barbuda
  • CaveTrail of Two Forests, United States of America
  • CaveTwo Sisters Cave, Jamaica
  • ShowcaveTyendinaga Cave, Canada
  • MineTykarpsgrottan, Sweden
  • SubterraneaTyne Tunnel, Great Britain
  • CaveTytoona Cave, United States of America
  • MineTytyri Gruvmuseum, Finland
  • KarstGrutas Tzabnah, México
  • CaveUamh-an-Righ, Great Britain
  • CaveGrutas de Uaxactún, Guatemala
  • ShowcaveGruta de Ubajara, Brazil
  • CaveUbong Caves, The Philippines
  • SubterraneaUçhisar Kalesi, Turkey
  • ShowcaveUchjimagi-do, Japan
  • SubterraneaUdabno, Georgia
  • SubterraneaUdaigiri Caves, India
  • CaveUdo-jingū, Japan
  • CaveUduigama, Japan
  • SubterraneaÜberlinger Stollen, Germany
  • CaveUfuyaguchi Shonyudo, Japan
  • KarstUgetoiwa, Japan
  • ShowcaveUhlovitsa Pestera, Bulgaria
  • CaveShpella e Ujkut, Albania
  • SubterraneaUlmener Maar-Stollen, Germany
  • SubterraneaUlmer Museum - Archaeological Collection, Germany
  • MineSchaubergwerk "Glück Auf" Ulpenalpe, Austria
  • CaveUlupaka, Niue
  • CaveUluru, Australia
  • CaveCaverna de Umajalanta, Bolivia
  • CaveGrottor i Umeå, Sweden
  • SubterraneaUmeda, Japan
  • MineUmoona Opal Mine and Museum, Australia
  • KarstUmpherston Sinkhole, Australia
  • SpringUnbuki Underwater Cave Entrance, Japan
  • ShowcaveUndara Lava Tubes, Australia
  • SubterraneaUndavalli Caves, India
  • SubterraneaBeijing’s Underground City, China
  • SubterraneaUnderground Church, Australia
  • SubterraneaMount Isa Underground Hospital and Museum, Australia
  • SubterraneaUnderground Potteries, Australia
  • MineUnderground Gold Miners Museum, United States of America
  • SubterraneaThe Underground Motel, Australia
  • SubterraneaUnderground House, United States of America
  • SubterraneaUnderground Prisoners Museum, Israel
  • CaveUnderWorld, Iceland
  • CaveUnderworld Adventures, New Zealand
  • KarstUnška koliševka, Slovenia
  • ShowcavePestera Ungurului, Romania
  • SubterraneaUnicorn Brewery Cellars, Australia
  • SubterraneaCentre for International Light Art, Germany
  • KarstFelsentor Unteremmendorf, Germany
  • SubterraneaBunkerstollen Unterland, Germany
  • CaveUpana Caves, Canada
  • SubterraneaUperkot Caves, India
  • SubterraneaUpliszikhe, Georgia
  • SubterraneaUpton Cave, United States of America
  • ShowcaveUracher Tropfsteinhöhle, Germany
  • KarstUracher Wasserfall, Germany
  • ShowcaveTham Urai Thong, Thailand
  • CaveCueva de Urallaga, Spain
  • CaveHotel Urashima, Japan
  • SubterraneaUrbex, Ukraine
  • ShowcaveCuevas de Urdax, Spain
  • SpringNacimiento Río Urederra, Spain
  • MineURÊKA, France
  • SubterraneaUrgeschichtliches Museum in Blaubeuren, Germany
  • SubterraneaÜrgüp Evi Cave Hotel, Turkey
  • GorgeOrridi di Uriezzo, Italy
  • SubterraneaUrnerloch, Switzerland
  • ShowcavePeştera Urşilor, Romania
  • SpringUrspring, Germany
  • SubterraneaMuseum Ladin Ursus ladinicus, Italy
  • SubterraneaUshibushi dōkutsu, Japan
  • SubterraneaUspensky Cave Monastery, Russia
  • CaveUst-Kansky, Russia
  • SubterraneaUtatlan Cave, Guatemala
  • SubterraneaConjunto de Cuevas de Utiel, Spain
  • MineUtö Iron Mines, Sweden
  • ShowcaveUtsuno Cave, Japan
  • SubterraneaFort d’Uxegney, France
  • ShowcaveCueva de la Vaca, Cuba
  • CaveCueva de la Vaca, Colombia
  • GorgeBarranco de las Vacas, Spain
  • ShowcaveLa Grotte de la Vache, France
  • CaveLa Grotte de la Vache, France
  • CaveVåde Ovn, Denmark
  • ShowcavePeştera de la Vadu-Crisului, Romania
  • ShowcaveVaganska Cave, Bosnia and Herzegovina
  • MineVagonetto, Greece
  • ShowcaveĐộng Vái Giời, Vietnam
  • KarstVaikona Chasm, Niue
  • CaveVaishno Devi, India
  • MineMine du Val de Fer, France
  • SpringOjos de Valdeminguete, Spain
  • MineCité de l’Or à Val-d’Or, Canada
  • ShowcavePestera Valea Cetatii, Romania
  • MineValenciana Mine, México
  • MineEcomuseo delle Miniere e della Val Germanasca, Italy
  • CaveShpella e Valit, Albania
  • KarstShpella e Valit, Albania
  • KarstValja Prerast, Serbia
  • MinePrehistorische Vuursteenmijnen te Valkenburg aan de Geul, Netherlands
  • CaveValkulamminvuoren luola, Finland
  • MineCentro Minerario di Valle Imperina, Italy
  • MineParco Minerario della Valle Trompia, Italy
  • SubterraneaValletta Tunnels, Malta
  • CaveValley of the Caves, United Arab Emirates
  • SubterraneaLa Grotte de Glace Valloire, France
  • ShowcaveGrottes de Vallorbe, Switzerland
  • SubterraneaMuseo de la Valltorta, Spain
  • ShowcaveCueva De Valporquero, Spain
  • KarstPolje of Valsamata, Greece
  • KarstPertes de la Valserine, France
  • MineCava Valsora, Italy
  • CaveVålters Grotta, Sweden
  • SubterraneaValtice sklípek, Czech Republic
  • MineEcomuseo delle miniere di Valtoppa, Italy
  • ShowcaveGrotten Van Hato, Curaçao
  • SubterraneaVanis Kvabebi, Georgia
  • ShowcaveĐộng Vân Trình, Vietnam
  • ShowcaveVar Barlang, Hungary
  • MineMine de Sel Varangéville, France
  • SubterraneaVardzia, Georgia
  • CaveVari Cave, Greece
  • GorgeParco Grotta Cascata Varone, Italy
  • ShowcaveGrotte di Val de’ Varri, Italy
  • ShowcavePeștera Ghețarul de la Vârtop, Romania
  • CaveCave of Saint Barbara, Greece
  • CaveVasco Caves, United States of America
  • SubterraneaVashistha Gufa, India
  • ShowcaveVass Imre barlang, Hungary
  • SubterraneaSacre Grotte Vaticane, Italy
  • CaveVatnajökull Glacier Crystal Cave, Iceland
  • ShowcaveVatnshellir, Iceland
  • SpringFontaine de Vaucluse, France
  • SubterraneaThe Vault, Netherlands
  • SubterraneaFort de Vaux, France
  • ShowcaveVazecka Jaskyna, Slovakia
  • CaveVeitensteinhöhle, Germany
  • KarstPonte di Veja, Italy
  • ShowcaveVela Špilja, Croatia
  • MineMuzej Premogovništva Slovenije, Slovenia
  • MineMinas Velha, Brazil
  • KarstVeliki Samograd, Bosnia and Herzegovina
  • GorgeRokle Veľký Kyseľ, Slovakia
  • GorgeVeľký Sokol, Slovakia
  • MineMina du Veloso, Brazil
  • MineErlebnisbergwerk Velsen, Germany
  • CaveCavernas del Venado, Costa Rica
  • ShowcaveVenetsa Cave, Bulgaria
  • SubterraneaVenetsanos Winery, Greece
  • SubterraneaCatacombe ebraiche di Venosa, Italy
  • ShowcaveCueva Ventana, Puerto Rico
  • KarstVentana Natural Arch, United States of America
  • KarstLa Ventana Natural Arch, United States of America
  • ShowcaveCueva de las Ventanas, Spain
  • KarstVentano del Diablo, Spain
  • ShowcaveGrotta del Vento, Italy
  • CaveSpiaggia della Grotta Verde, Italy
  • CaveGrotta Verde, Italy
  • CaveLe Grotte Verdi di Pradis, Italy
  • GorgeGorges du Verdon, France
  • SubterraneaVereina Tunnel, Switzerland
  • GorgeVerenaschlucht, Switzerland
  • MineMuseo dell’Oro e della Bessa, Italy
  • SpringSource du Verneau, France
  • SubterraneaVersuchStollen Hagerbach, Switzerland
  • ShowcaveVerteba Pestera, Ukraine
  • CaveVeryovkina, Georgia
  • MineVestenburger Stollen, Germany
  • ShowcavePeştera Veterani, Romania
  • ShowcaveŠpilja Veternica, Croatia
  • SubterraneaVettuvan Koil Temple, India
  • SubterraneaVeuve Clicquot, France
  • SpringVevčanski Izvori, North Macedonia
  • SubterraneaVezir Cave Suites, Turkey
  • GorgeVia Mala, Switzerland
  • SubterraneaCriptoportico Romano Vicenza, Italy
  • SubterraneaVictoria Tunnel, Great Britain
  • ShowcaveCueva Victoria, Spain
  • MineMina Victòria, Spain
  • ShowcaveVictoria Fossil Cave, Australia
  • SubterraneaVicus Caprarius, Italy
  • ShowcaveHellirinn Vidgelmir, Iceland
  • CaveCueva de la Vieja, Spain
  • MineMines de Vielle Aure, France
  • SubterraneaVieng Xai Cave City, Laos
  • SubterraneaUnknown Underground Vienna, Austria
  • ShowcaveCueva del Viento, Spain
  • CaveCueva del Viento, Puerto Rico
  • MineChevalement du Vieux II, France
  • CaveAbysso Vigant, Italy
  • SubterraneaCarriere de Vignemont, France
  • SubterraneaDemeure de la Vignole, France
  • CaveTham Pya Nak - Viking Cave, Thailand
  • KarstFarángi Vikou, Greece
  • MineMina Vila Rica, Brazil
  • KarstFurnas de Vila Velha, Brazil
  • MineVildmarksgruvan, Sweden
  • ShowcaveJama Vilenica, Slovenia
  • CaveVillacorta Cave, The Philippines
  • SubterraneaVilla Fliedner, Germany
  • CaveCueva de Villa Luz, México
  • MineBergwerk Villanders, Italy
  • SpringVilla Pliniana Spring, Italy
  • ShowcaveGrotte Prehistorique de Villars, France
  • SubterraneaVilla Torlonia, Italy
  • SubterraneaVillecroze Caves, France
  • SubterraneaChateau Villemaurine, France
  • SubterraneaFort de Villey-le-Sec, France
  • SubterraneaVimy Memorial - Grange Tunnel, France
  • SubterraneaMúzeum Vín Prešov, Slovakia
  • CaveSpilja Vindija, Croatia
  • MineVinegar Hill Mine, United States of America
  • SubterraneaVịnh Mốc tunnels, Vietnam
  • GorgeBlejski vintgar, Slovenia
  • ShowcavePestera Vintului, Romania
  • SubterraneaSantuario de la Virgen de la Balma, Spain
  • SubterraneaVirgilkapelle, Austria
  • SpringVirgin Falls, United States of America
  • SubterraneaTomb of the Virgin Mary, Israel
  • MineVisnes Gruvemuseum, Norway
  • SubterraneaFestung Vitznau, Switzerland
  • KarstVivarium, Slovenia
  • ShowcavePećina Vjetrenica, Bosnia and Herzegovina
  • ShowcavePu Sam Cap Grottoes, Vietnam
  • SubterraneaVodojemy Brno, Czech Republic
  • GorgeDr.-Vogelgesang-Klamm, Austria
  • CaveVogelherdhöhlen, Germany
  • CaveVogelherdgrotte, Germany
  • KarstVogts Grub, Germany
  • SubterraneaVoice of Biafra Bunker, Nigeria
  • CaveVolivoli Cave, Fiji
  • CaveVolkmarskeller, Germany
  • MineVolle Rose, Germany
  • SubterraneaSub Terra Vorau, Austria
  • GorgeVorderkaserklamm, Austria
  • ShowcaveVorontsovskaya Cave, Russia
  • CaveVoronya pestera, Georgia
  • SpringVortex Spring, United States of America
  • KarstVoulismeno Aloni, Greece
  • GorgeVouraikos Gorge, Greece
  • ShowcaveŠpilja Vranjača - Vranjaca Cave, Croatia
  • GorgeVranjska draga, Croatia
  • GorgeKanjon Vratne, Serbia
  • GorgeVražji Prolaz, Croatia
  • ShowcavePeštera Vrelo, North Macedonia
  • ShowcaveVrelo Špilja, Croatia
  • ShowcaveŠpilja Vrlovka, Croatia
  • SubterraneaVulcania, France
  • SubterraneaVulkan Brauerei, Germany
  • MineVulture City Gold Mine and Ghost Town, United States of America
  • SpringLu Vurghe, Italy
  • ShowcaveJeskyně Výpustek, Czech Republic
  • GorgeVzintga Gorge, Molvanîa
  • SubterraneaWabasha Street Caves, United States of America
  • GorgeWadi Ghul, Oman
  • CaveWadi Naqab Cave, United Arab Emirates
  • CaveWadi Rahabah Cave, United Arab Emirates
  • GorgeWadi Shab, Oman
  • SubterraneaLe Fort Wagner, France
  • CaveWai’anapanapa Cave, United States of America
  • MineWaihi Gold Mining Museum and Art Gallery, New Zealand
  • CaveWaikanaloa Caves, United States of America
  • GorgeWaimea Canyon, United States of America
  • CaveWaipu Caves, New Zealand
  • CaveCuevas de Waira, Argentina
  • SpringWakulla Spring, United States of America
  • GorgeWalatowa Slot Canyon, United States of America
  • MineMuzeum Przemyslu i Techni w Walbrzychu, Poland
  • SubterraneaPodziemne Fabryki Walimia, Poland
  • MineWalk-in Mine, Australia
  • MineWallace District Mining Museum, United States of America
  • SubterraneaSandsteinhöhle in Walldorf, Germany
  • MineWalsenburg Mining Museum, United States of America
  • CaveWalsingham Cave, Bermuda
  • MineMinera Wanda, Argentina
  • SubterraneaWanfotang Grottoes, China
  • CaveGua Wang Burma, Malaysia
  • KarstNamtok Wang Sai Thong, Thailand
  • ShowcaveWangtian Dong Rongdong, China
  • MineWanlockhead Museum, Great Britain
  • ShowcaveWannian Ice Cave, China
  • GorgeGeolandschaft Wanterbaach-Siweschlëff, Luxembourg
  • ShowcaveWanxiang Dong, China
  • CaveWapsipinicon State Park Caves, United States of America
  • SubterraneaWarana Raja Maha Viharaya, Sri Lanka
  • ShowcaveWar Eagle Cavern, United States of America
  • ShowcaveGua Wareh, Indonesia
  • SubterraneaWar H.Q. Tunnels, Malta
  • SubterraneaWarren’s Shaft, Israel
  • CaveWarsaw Caves, Canada
  • MineSchaubergwerk "Herkules-Frisch-Glück" Waschleithe, Germany
  • MineWashington ’F’ Pit Industrial Museum, Great Britain
  • MineWashington Gold And Silver Mine, United States of America
  • ShowcaveWashizawa Fuketsu, Japan
  • GorgeWasserlochklamm, Austria
  • SpringWassermannsloch, Austria
  • SubterraneaNürnberger Wasserstollen und Kasematten, Germany
  • CaveWater Holes Cave, Bulgaria
  • ShowcaveWatermouth Caves, Great Britain
  • GorgeWatkins Glen State Park, United States of America
  • SubterraneaWattson and Wattson Jewelry Store, United States of America
  • CaveGoa Watu Joglo, Indonesia
  • CaveWaulpane Cave, Sri Lanka
  • SubterraneaFloyd Collins Museum, United States of America
  • CaveWestern Belize Regional Cave Project, Belize
  • CaveWeathercote Cave, Great Britain
  • CaveWeathercote Cave, Great Britain
  • MineWeaver Hall Museum and Workhouse, Great Britain
  • CaveWebergrotte, Germany
  • CaveWeber an der Wand, Germany
  • CaveWeebubbie Cave, Australia
  • SpringWeeki Wachee, United States of America
  • MineWegner Crystal Mines, United States of America
  • MineMines d’Argent de Wegscheid, France
  • SubterraneaKanaltunnel Weilburg, Germany
  • MineBergbau- und Stadtmuseum Weilburg, Germany
  • KarstSinterterrassen von Weißenbrunn, Germany
  • SubterraneaWeißenstädter Kellerwelt, Germany
  • MineBesucherbergwerk Fundgrube Weißer Hirsch, Germany
  • SpringWekiwa Springs, United States of America
  • ShowcaveWell Byan Cave, Myanmar
  • ShowcaveWellington Caves, Australia
  • SubterraneaWellington Caves, France
  • CaveWell of Souls, Israel
  • SubterraneaFelsenkeller Kloster Weltenburg, Germany
  • CaveWemyss Caves, Great Britain
  • CaveWendalinus Höhle, Germany
  • ShowcaveWendelsteinhöhle, Germany
  • MineGrube Wenzel, Germany
  • SpringWerner-Boyce Salt Springs, United States of America
  • MineBergwerk Werra, Germany
  • CaveWest Cave, United States of America
  • SubterraneaWestern Approaches Command Centre, Great Britain
  • SubterraneaThe Western Wall Tunnels, Israel
  • SubterraneaWest Norwood Cemetery Catacombs, Great Britain
  • CaveWest Salt Cave, Iran
  • SubterraneaWestwallmuseum Pirmasens, Germany
  • SubterraneaWestwallmuseum Irrel, Germany
  • SubterraneaWestwallmuseum Bad Bergzabern, Germany
  • SubterraneaWestwallmuseum Sinz, Germany
  • SubterraneaWestwallmuseum Mettlach, Germany
  • SubterraneaWestwallmuseum Wiltingen, Germany
  • SubterraneaWestwallmuseum Konz, Germany
  • SubterraneaWest Wycombe Caves, Great Britain
  • SubterraneaWeta Cave, New Zealand
  • MineBesucherbergwerk Wetzsteinstollen, Germany
  • MineWheal Hughes Copper Mine, Australia
  • CaveWhite Cave, Canada
  • MineWhite’s Mining Museum, Australia
  • SubterraneaWhite Cliffs, Australia
  • CaveWhite Cliff Cave, United States of America
  • CaveWhite Fathers Cave, Ireland
  • ShowcaveWhite Scar Cave, Great Britain
  • SubterraneaHöhlenburg Wichenstein, Switzerland
  • CaveWidderin Caves, Australia
  • MineWidow Jane Mine, United States of America
  • KarstWied il-Mielah Window, Malta
  • ShowcaveWiehler Tropfsteinhöhle, Germany
  • MineWieliczka Salt Mine, Poland
  • SubterraneaWienerwaldmuseum, Austria
  • ShowcaveJaskinia Wierzchowska Górna, Poland
  • MineDeutsches Erdölmuseum Wietze, Germany
  • SubterraneaNederlands Wijnmuseum Arnhem, Netherlands
  • CaveWildenmannlisloch, Switzerland
  • CaveWildkirchli, Switzerland
  • MineWildschönauer Erlebnisbergwerk, Austria
  • MineWille Gottes Thalheim, Germany
  • SubterraneaWilliamson’s Tunnels, Great Britain
  • CaveWilson Butte Cave, United States of America
  • GorgeWimbachklamm, Germany
  • ShowcaveFriedrichshöhle - Wimsener Höhle, Germany
  • ShowcaveWind Cave, United States of America
  • ShowcaveWind Cave, Malaysia
  • CaveWind Cave at House Rock, United States of America
  • ShowcaveWind Cave, Malaysia
  • SubterraneaWindber Coal Heritage Center, United States of America
  • MineWinding House, Great Britain
  • GorgeWindjana Gorge, Australia
  • CavePhilp’s Cave, Great Britain
  • CaveWindsor Cave, Jamaica
  • CaveWinterlislöchli, Switzerland
  • MineBesucherbergwerk Wismutstolln, Germany
  • GorgeWitches Gulch, United States of America
  • ShowcaveCave Without a Name, United States of America
  • SubterraneaWłodarz Complex, Poland
  • MineBesucherbergwerk Wodanstolln, Germany
  • GorgeWörschachklamm, Austria
  • CaveWogan Cavern at Pembroke Castle, Great Britain
  • MineGrube Wohlfahrt, Germany
  • CaveWolf Cave, Great Britain
  • CaveGrotte du Wolfloch, France
  • MineWolframines, France
  • CaveWolf Rock Cave, United States of America
  • GorgeWolfsklamm, Austria
  • KarstSteinerne Rinne bei Wolfsbronn, Germany
  • SubterraneaWolfsschanze, Poland
  • GorgeWolfsschlucht, Germany
  • GorgeWolfsschlucht, Luxembourg
  • MineWolfsschlucht Porta Westfalica, Germany
  • SubterraneaBunker Wollenberg, Germany
  • ShowcaveWollondilly Cave, Australia
  • SubterraneaWonambi Fossil Centre, Australia
  • ShowcaveWonder Cave, United States of America
  • ShowcaveWondercave, South Africa
  • ShowcaveWonderful Cave, The Philippines
  • ShowcaveWonderland Cave Natural Park, United States of America
  • ShowcaveWonderland Cave, United States of America
  • ShowcaveWonderwerk Cave, South Africa
  • ShowcaveWonder World Cave, United States of America
  • CaveWondrous Caves, Jamaica
  • MineWonthaggi State Coal Mine, Australia
  • MineWoodhorn Colliery, Great Britain
  • ShowcaveWoodward Cave, United States of America
  • ShowcaveWookey Hole, Great Britain
  • SubterraneaWorld War II Tunnels, Great Britain
  • CaveWorley’s Cave, United States of America
  • SubterraneaBunkerpark Wünsdorf, Germany
  • ShowcaveWufeng Changsheng Cave, China
  • ShowcaveWugui Dong - Black Ghost Cave, China
  • CaveWulfbachquellhöhle, Germany
  • CaveWundershöhle, Germany
  • KarstWurt Pit and Devil’s Punchbowl, Great Britain
  • SubterraneaBunkermuseum Wurzenpass, Austria
  • GorgeWutachschlucht, Germany
  • ShowcaveWuyan Cave, China
  • ShowcaveWyandotte Caves, United States of America
  • CaveXanadu Cave, New Zealand
  • SubterraneaTham Xang, Laos
  • SubterraneaXarbes Caves, Iran
  • CaveXavier Cave, India
  • KarstCenote X’batun, México
  • ShowcaveXcaret, México
  • ShowcaveTham Xe Bang Fai, Laos
  • KarstXel-Há, México
  • ShowcaveCova d’en Xeroni, Spain
  • ShowcaveGħar Xerri, Malta
  • CaveShpella e Xherxhillës, Albania
  • CaveXia Bing Dong, China
  • ShowcaveDixia Liefeng, China
  • ShowcaveXian Pu Dong, China
  • ShowcaveXianqidong, China
  • ShowcaveXianrendong, China
  • KarstFairy Bridge, China
  • CaveLushan Fairy Cave, China
  • KarstXiaozhai Tiankeng, China
  • KarstXiashiyuan Tiankeng, China
  • MineXilutian Mine, China
  • ShowcaveXinmi Shenxian Cave, China
  • ShowcaveXionglong Cave, China
  • SubterraneaXlendi Emergency Flour Mill, Malta
  • ShowcaveCueva d’en Xoroi, Spain
  • CaveGrutas de Xoxafi, México
  • ShowcaveXplor, México
  • ShowcaveGrutas Xtacumbil-Xunan, México
  • SubterraneaXuan Kong Si, China
  • ShowcaveXuansu Cave, China
  • ShowcaveXuehuadong - Snow Flake Cave, China
  • ShowcaveXueyu Cave, China
  • KarstCenote Yaal Utzil, México
  • SubterraneaYaechika, Japan
  • ShowcaveYaeyama Limestone Cave, Japan
  • ShowcaveTham Yai Nam Nao, Thailand
  • ShowcaveYajagama Cave, Japan
  • ShowcaveYalandünya Mağarası, Turkey
  • ShowcaveYalta Cave, Russia
  • CaveYamashita First Cave, Japan
  • ShowcaveYampah Hot Springs Vapor Caves and Spa, United States of America
  • KarstYana Rocks, India
  • ShowcaveYanchep Caves - Crystal Cave, Australia
  • SubterraneaYangling Museum, China
  • ShowcaveYangming Cave, China
  • ShowcaveYanzi Dong, China
  • CaveYanziya Scenic Area, China
  • KarstDaqikong, China
  • ShowcaveYaolindong, China
  • CaveYarımburgaz Mağarası, Turkey
  • ShowcaveYathae Pyan Cave, Myanmar
  • KarstCenote Yax Há, México
  • GorgeDesfiladero de la Yecla, Spain
  • SubterraneaYekedeshik Cave City, Turkmenistan
  • ShowcaveYelang Dong, China
  • SubterraneaYeletskyi Monastery, Ukraine
  • SubterraneaYemrehanna Kristos Church, Ethiopia
  • SubterraneaYerebatan Sarnıçı - Cistern Basilica, Turkey
  • ShowcaveYeren Dong, China
  • ShowcaveYerküpe Mağarası, Turkey
  • ShowcaveCueva del Yeso de Baena, Spain
  • CaveYeyenwu Cave, Vanuatu
  • KarstYincuixia, China
  • CaveYinhe Dong, China
  • ShowcaveYinhedong, China
  • ShowcaveYinhudong, China
  • ShowcaveYinshui Dong, China
  • ShowcaveYinzi Cave, China
  • ShowcaveYishui Underground Grand Canyon, China
  • SubterraneaYokoi’s Cave, Guam
  • CaveYonderup Cave, Australia
  • ShowcaveYongyeon Cave, South Korea
  • CaveYooki Cave Ruins, Japan
  • CaveYordas Cave, Great Britain
  • CaveYordas Cave, Great Britain
  • SubterraneaYoshimi Hyakuana, Japan
  • CaveYourambulla Caves, Australia
  • ShowcaveYozawa shonyudo, Japan
  • CaveMonastery of the Assumption of the Lord, Greece
  • MineBesucherbergwerk Ypsilanta, Germany
  • GorgeYsperklamm, Austria
  • ShowcaveYuanyang Cave, China
  • MineYubari-si Sekitan-no-Rekisimura, Japan
  • SubterraneaYucca Mountain Science Center, United States of America
  • ShowcaveYuedong, China
  • ShowcaveYugen-do, Japan
  • ShowcaveLok Yu-Hua Dong, China
  • SubterraneaYuhuang Cave, China
  • CaveYuki-do, Japan
  • SubterraneaYulin Grotto, China
  • ShowcaveYulong Dong, China
  • ShowcaveLichuan Yulong Cave, China
  • SubterraneaYunak Evleri, Turkey
  • CaveYunfengdong, China
  • ShowcaveYunfu Panlong Cave, China
  • SubterraneaYungang Grottoes, China
  • ShowcaveYunshui Cave, China
  • CaveYur’yevskaya Peshchera, Russia
  • CaveCueva Yuyu, Puerto Rico
  • MineZabytkowa Kopalnia, Poland
  • KarstCenote Zacatón, México
  • KarstCenote Zací, México
  • ShowcaveBoquete de Zafarraya, Spain
  • ShowcaveZahlan Cave, Lebanon
  • SpringŽalsvasis šaltinis, Lithuania
  • ShowcaveGruta do Zambujal, Portugal
  • GorgeZammer Lochputz, Austria
  • KarstKanjonu Zamne, Serbia
  • ShowcaveZane Caverns, United States of America
  • CaveCùel Zanzanù, Italy
  • SubterraneaZarni-Parni Cave Fortress, Armenia
  • KarstLacu Záton, Romania
  • KarstZaveri’s Cavity, Albania
  • ShowcaveZbrašovské aragonitové jeskyně, Czech Republic
  • SubterraneaTomb of Zechariah, Israel
  • SubterraneaIndustriemuseum Zeche Hannover, Germany
  • SubterraneaUnterirdisches Zeitz, Germany
  • CaveZelena Špilja, Croatia
  • SpringZelenci, Slovenia
  • ShowcaveŽelezna jama, Slovenia
  • SubterraneaRestaurant Železná Růže, Czech Republic
  • CaveZelške jame, Slovenia
  • SubterraneaZelve Monastery, Turkey
  • MineŠtola Země zaslíbená, Czech Republic
  • MineMúzeum Zemplínske Hámre, Slovakia
  • SubterraneaZeniarai Benzaiten Ugafuku Shrine, Japan
  • CaveZervati Cave, Greece
  • CaveZeus Cave, Turkey
  • CaveZeus’ Childhood Cave, Greece
  • ShowcaveZeytintaşi Mağarası, Turkey
  • GorgeZhangjiajie National Forest Park, China
  • SubterraneaZhaishan Tunnel, China
  • SubterraneaZhangfang Ancient Battle Tunnel, China
  • ShowcaveZhanggong Dong, China
  • ShowcaveZhangguan Dong, China
  • KarstZhenxiong Tiankeng, China
  • ShowcaveZhijindong, China
  • GorgeZhijin Grand Canyon, China
  • ShowcaveYiyuan Zhinu Cave, China
  • ShowcaveShilin Zhiyun Cave, China
  • ShowcaveZhongdong, China
  • ShowcaveZhongfeng Cave, China
  • KarstZhongshiyuan Tiankeng, China
  • ShowcaveZhoukoudian - Peking Man Site, China
  • SubterraneaZigzag Path, Great Britain
  • MineZillertaler Goldschaubergwerk, Austria
  • CaveKulthöhle Zillis, Switzerland
  • MineMine de Cuivre la Lée à Zinal, Switzerland
  • ShowcaveZindan Mağarası, Turkey
  • MineErzweg Zinkwand, Austria
  • MineBesucherbergwerk Zinnkammern Pöhla, Germany
  • MineBesucherbergwerk Zinnwald, Germany
  • CaveZinselhöhle, Germany
  • ShowcaveGrotta Zinzulusa, Italy
  • SubterraneaZion, Matrix
  • GorgeZion Narrows, United States of America
  • MineCatedral de Sal Zipaquirá, Colombia
  • ShowcaveZi Xia Dong, Malaysia
  • GorgeZixiadong Gorge, China
  • ShowcaveZixia Cave, China
  • ShowcaveJaskyňa Zlá Diera, Slovakia
  • SubterraneaHistorická Pivnica Zlatý Strapec, Slovakia
  • ShowcaveZlotske Pećine, Serbia
  • SubterraneaZnojmo Podzemi, Czech Republic
  • MineZeche Zollverein, Germany
  • MineZonguldak Mining Museum, Turkey
  • SubterraneaZoo de Doué la Fontaine, France
  • CaveZoolithenhöhle, Germany
  • MineZouerate, Mauritania
  • SubterraneaBunkermuseum Zoutelande, Netherlands
  • SubterraneaCasa Rupestre Zovencedo, Italy
  • MineRudnik Zrinski, Croatia
  • MineBesucherbergwerk Zschopau, Germany
  • GorgeZügenschlucht, Switzerland
  • SubterraneaZum Turm, Italy
  • MineMuzeum Żup Krakowskich Wieliczka, Poland
  • CaveZwergenkirche, Germany
  • ShowcaveZwiefaltendorfer Tropfsteinhöhle, Germany
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