• Subterranea10,000 Year Clock, United States of America
  • SubterraneaUnderground Project 131, China
  • MineMina 13 de Maio, Brazil
  • Mine19-Lachter-Stollen, Germany
  • CaveTunnel de lave 2004, France
  • Cave3N Cave - Namakdan Cave, Iran
  • SubterraneaThird Man Tour, Austria
  • Subterranea816 Military Nuclear Plant, China
  • SpringAachquelle, Germany
  • GorgeAareschlucht, Switzerland
  • SubterraneaAbadía del Sacromonte, Spain
  • ShowcaveAbaligeti-barlang, Hungary
  • SpringAbano Mineral Lake Natural Monument, Georgia
  • MineMuseo Minerario di Abbadia San Salvatore, Italy
  • 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
  • SubterraneaCaves Ackerman, France
  • CaveGrotta di Acquasanta, Italy
  • ShowcaveCuevas de Actún Kan, Guatemala
  • SubterraneaCuevas de Acusa Seca, Spain
  • SubterraneaAdjimushkay Quarries, Russia
  • CaveAdmiral's Cave, Bermuda
  • GorgeAdršpašsko-teplické skály, Czech Republic
  • ShowcaveCueva de Adsubia, Spain
  • MineAdventure Copper Mine, United States of America
  • CaveAfawa Cave, Papua New Guinea
  • CaveMagharet Afqua, Lebanon
  • ShowcaveAggertalhöhle, Germany
  • 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
  • ShowcaveSpilia Agio Gala, Greece
  • CaveSpilaio to Agiou Antoniou, 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
  • SubterraneaAgios Spyridon, Cyprus
  • CaveThe Glittering Caves of Aglarond, Middle-Earth
  • SubterraneaA GoGo Valkenburg, Netherlands
  • CaveCueva del Agua, Spain
  • SpringAgua Azul, 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
  • ShowcaveAin Wazein Cave, Lebanon
  • 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
  • SubterraneaCuevas Pedro Antonio de Alarcón, Spain
  • CaveAlayan-Lion Cave System, The Philippines
  • 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
  • MineAldrich Coal Mine Museum, United States of America
  • SubterraneaAleksandrovo Thracian Tomb, Bulgaria
  • ShowcaveAlepotrypa, Greece
  • SubterraneaAlexander's Cave Houses, 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
  • ShowcaveAl Hotta Cave, Oman
  • SubterraneaAliança Underground Museum, Portugal
  • 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
  • GorgeAlmbachklamm, Germany
  • CaveCueva de Almendras, Perú
  • MineAlmond Valley Heritage Centre, Great Britain
  • SpringAlmyros Spring, Greece
  • SpringAlmyros Ag. Nikolaou, Greece
  • KarstAlofaaga Blowholes, Samoa
  • SubterraneaLa Grotte de Glace Alpe d’Huez, France
  • ShowcaveJebal Al Qarah, Saudi Arabia
  • ShowcaveAltamira, Spain
  • CavePiatra Altarului, Romania
  • MineSalzbergwerk Altaussee, Austria
  • MineBesucherbergwerk Alte Hoffnung Erbstolln, Germany
  • MineBergbaumuseum Altenberg, Germany
  • ShowcaveAltensteiner Höhle, Germany
  • SubterraneaAlter Elbtunnel, Germany
  • CaveAltinbesik Mağarası, Turkey
  • SubterraneaAltinocak Restaurant, Turkey
  • CaveCueva de Altxerri, Spain
  • ShowcaveAlufu Dong, China
  • CaveAlum Cave, United States of America
  • CaveAlutila Cave, Bangladesh
  • 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
  • SubterraneaAmerican Cave Museum, United States of America
  • MineVelká Amerika, Czech Republic
  • MineStollnsystem »Am Graben«, Germany
  • SubterraneaAmi Chenin, France
  • SubterraneaAmir Chakhmaq Complex, Iran
  • MineAmlwch Copper Kingdom, Great Britain
  • KarstTuffière d´Amorey, France
  • SubterraneaAmos Rex, Finland
  • CaveAmpanito Valakely, Madagascar
  • ShowcaveAm Phu Cave, Vietnam
  • ShowcaveAnakami shonyudo, Japan
  • 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
  • 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
  • ShowcaveGrotte d'Anjohibe, Madagascar
  • SubterraneaAnlage Mitte, Poland
  • ShowcaveAnna Barlang, Hungary
  • MineGrube Anna-Elisabeth, Germany
  • SubterraneaChurch of the Annunciation, Israel
  • CaveAnsite, Spain
  • GorgeAntelope Canyon, United States of America
  • 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
  • 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
  • CaveArches National Park, United States of America
  • 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
  • MineArdoisalle 1947, Belgium
  • GorgeCueva Arenales, Puerto Rico
  • CaveLa grotta delle Arene Candide, Italy
  • CaveAreni Cave, Armenia
  • SpringFonte Aretusa, Italy
  • GorgeGorges de l'Areuse, Switzerland
  • 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
  • SubterraneaAruküla Caves, Estonia
  • 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
  • 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
  • SubterraneaAtaman Hotel, Turkey
  • ShowcaveAtapuerca, Spain
  • CaveAtea Kananda, Papua New Guinea
  • CaveGrutas de Atepolihui, México
  • CaveAtlantida, Ukraine
  • SubterraneaAtlantikwall, France
  • MineAtlas Coal Mine National Historic Site, Canada
  • SubterraneaKGB Atominis Bunkeris, Lithuania
  • SubterraneaAtomkeller, Germany
  • SubterraneaThe Treasury of Atreus, Greece
  • ShowcaveAttahöhle, Germany
  • SubterraneaLa Carrière d'Aubigny, France
  • ShowcaveGrotte des Audides, France
  • SubterraneaAuerbachs Keller, 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
  • 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
  • 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
  • SubterraneaBadami Cave Temple, India
  • MineKurzentrum Bad Bleiberg, Austria
  • MineBadger Mine and Museum, United States of America
  • CaveBaekryong Donggul, South Korea
  • ShowcaveBärenhöhle, 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
  • ShowcaveBailong Dong, China
  • ShowcaveBaima Dong, China
  • CaveBái Ma Jiàng Jun Dòng, China
  • ShowcaveBaimo Cave, China
  • ShowcaveBainiao Cave, China
  • CaveBaishiya Karst Cave, China
  • ShowcaveBaixiangdong, 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
  • 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
  • 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
  • ShowcaveBā mǎ dòngtiānfúdì, China
  • KarstBamei Polje, China
  • MineBaňa Cígeľ, Slovakia
  • MineBanbury Tourist Mine, New Zealand
  • SubterraneaBandelier, United States of America
  • SubterraneaBandiagara Escarpment, Mali
  • GorgeBănița Gorge, Romania
  • SubterraneaBanjaran Hotsprings Retreat, Malaysia
  • MineBanská Štiavnica, Slovakia
  • ShowcaveBanwell Bone Caves, Great Britain
  • SpringBaotu Spring, 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
  • SubterraneaBarry troglodyte village, France
  • KarstBarsuko Ola, Lithuania
  • MineBartholomäberg, Austria
  • MineBartholomäusschacht, Germany
  • CaveBarton Creek Cave, Belize
  • 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
  • ShowcaveBat Bar (Lost Canyon Cave), United States of America
  • CaveBates Cave, Australia
  • ShowcaveBathala Caves, The Philippines
  • CaveBat Cave, Montserrat
  • MineBattery Hill, Australia
  • SubterraneaBattle of Britain Control Room, Great Britain
  • ShowcaveBatu Caves, Malaysia
  • ShowcaveGoa Batu Cermin, Indonesia
  • CaveGua Batu Maloi, Malaysia
  • ShowcaveAgop Batu Tulug, Malaysia
  • ShowcaveBaumannshöhle, Germany
  • SubterraneaBava Pyara Caves, India
  • 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
  • CaveGrotte de Beaussac, France
  • KarstBeaver Falls Karst Trail, United States of America
  • 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
  • ShowcaveBelianska Jaskyna, Slovakia
  • SubterraneaBell Caves, Israel
  • ShowcaveCuevas de Bellamar, Cuba
  • GorgeOrrido di Bellano, Italy
  • ShowcaveLes grottes 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
  • 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
  • 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
  • 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
  • ShowcavePatal Bhuvaneshvar, India
  • ShowcaveBicchu-Kanachi ana, Japan
  • 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
  • ShowcavePecina Bijambare - Bijambare Cave, Bosnia and Herzegovina
  • 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
  • SubterraneaBird's Botanicals, United States of America
  • MineBirkhill Caverns Clay Mine, Great Britain
  • SubterraneaBirresborner Eishöhlen, Germany
  • ShowcavePeštera "Biserna" - Pearl Cave, Bulgaria
  • ShowcaveŠpilja Biserujka, Croatia
  • 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
  • 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
  • CaveBloomington Cave, United States of America
  • CaveIl-Hnejja, Malta
  • KarstBlue Hole, Egypt
  • CaveBlue Creek Cave, Belize
  • CaveBlue Eye, Cabo Verde
  • MineBlue Hills Tin Streamers, Great Britain
  • KarstBlue Hole, Belize
  • SpringBlue Hole Spring, United States of America
  • SpringBlue Hole, Jamaica
  • SpringBlue Hole Mineral Spring, Jamaica
  • 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
  • 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
  • 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
  • MineBong Mieu Gold Mine, Vietnam
  • CaveBoninska Peshtera, Bulgaria
  • CaveCueva Bonita, Spain
  • ShowcaveBonnechere Caves, Canada
  • MineBonne Terre Mine, United States of America
  • 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
  • ShowcaveGrotta di Bossea, Italy
  • SubterraneaBottini, Italy
  • ShowcaveGruta de Botuverá, Brazil
  • CaveBoulder Caves, United States of America
  • CaveBoulder Cave, United States of America
  • 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
  • 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
  • SubterraneaBrighton's Victorian Sewer, Great Britain
  • CaveBrillenhöhle, Germany
  • KarstBrimble Pit and Cross Swallet Basins, Great Britain
  • SubterraneaAqueduc Souterrain de Briord, France
  • ShowcaveBristol Caverns, United States of America
  • SubterraneaMuzeum brněnského podzemí, Czech Republic
  • SubterraneaBrněnská kostnice, Czech Republic
  • MineBroken Boot Gold Mine, United States of America
  • MineSchaustollen Silberbergwerk Bromriesen, Austria
  • SubterraneaBronson Caverns, United States of America
  • SubterraneaBrotherhood Winery, United States of America
  • GorgeBroumovské stěny, Czech Republic
  • CaveBruce's Cave, Ireland
  • SubterraneaBruce's Cave, Great Britain
  • CaveBruce Peninsula Grotto, Canada
  • CaveBruce's Caves, Canada
  • CaveWiarton's Hermit, Canada
  • 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
  • MineMiniera d'Oro di Brusson, Italy
  • 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
  • MineSchaubergwerk Büchenberg, Germany
  • ShowcaveGrotta di Bue Marino, Italy
  • CaveBuenavista Cave, The Philippines
  • CaveBuffalo National River, United States of America
  • SubterraneaBuffalo Bayou Park Cistern, United States of America
  • CaveBugasan Cave, The Philippines
  • MineKalimuseum Buggingen, Germany
  • 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
  • SpringIzvor Buna, Bosnia and Herzegovina
  • SubterraneaBundesbank-Bunker, Germany
  • SubterraneaAtombunker der Bundesregierung, Germany
  • SubterraneaBunkeri, Croatia
  • 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
  • ShowcaveButterfly Cave, China
  • 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 de la Mine Cagnac les Mines, France
  • SubterraneaManoir de la Caillère, France
  • 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
  • ShowcaveCallao Cave, The Philippines
  • KarstCircuit de la Vallée Sèche de Calmoutier, France
  • 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
  • ShowcaveLes Canalettes, France
  • ShowcaveCuevas del Canelobre, Spain
  • SubterraneaCanard Duchene, France
  • CaveCanashito Grot, Aruba
  • ShowcaveCandelaria Caves, Guatemala
  • KarstCenotes de Candelaria, Guatemala
  • CaveGrotta del Cane, Italy
  • ShowcaveCango Caves, South Africa
  • CaveGruta de las Canicas, México
  • MineÇankırı Tuz Mağarası, Turkey
  • ShowcaveCova de Can Marçà, Spain
  • 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
  • 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
  • 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
  • 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
  • ShowcaveAlgar do Carvão, Portugal
  • MineMuseu Estadual do Carvão, Brazil
  • ShowcaveGruta 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
  • 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
  • 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
  • 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
  • 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
  • ShowcaveGrotta del Cavallone, Italy
  • CaveFurnas do Cavalum, Portugal
  • CaveCavannagh Cave, Anguilla
  • CaveCave-in-Rock State Park, United States of America
  • 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
  • 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
  • CaveCavern Lake Cave, United States of America
  • 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
  • CaveCave Stream, New Zealand
  • ShowcaveCave Vineyard, United States of America
  • MineMuseo della Miniera e del Territorio Cavriglia, Italy
  • 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
  • ShowcaveCehennemağzi Mağarası, Turkey
  • CaveGrotte Célestine, France
  • ShowcaveCennet Adası Mağarası, Turkey
  • ShowcaveCennet ve Cehennem, Turkey
  • CaveCenobio de Valerón, Spain
  • KarstCenotillo, México
  • CaveCentaur's Cave, Antigua & Barbuda
  • 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
  • CaveGrotte de la Chaise, France
  • ShowcaveChal-Nakhjir, Iran
  • SubterraneaChalukyan Caves, India
  • SubterraneaEstación de Chamberí, Spain
  • MineChambers of the Black Hand, Australia
  • ShowcaveChamera Guffa, Nepal
  • SubterraneaMusée Suisse de la Spéléologie, Switzerland
  • SubterraneaFort d'artillerie de Champex-Lac, Switzerland
  • SubterraneaLe Musée du Champignon, France
  • MineChañarcillo Mine, Chile
  • SubterraneaChangyu Dongtian - Changyu Stone Cave, China
  • SubterraneaThe Channel Island Military Museum, Great Britain
  • SubterraneaChannel Tunnel, Great Britain
  • ShowcaveChaoyang Dong, China
  • SubterraneaEl Chapandáz, Spain
  • CaveChapel Cave, United States of America
  • ShowcaveGua Charah, Malaysia
  • 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
  • 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
  • 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 de Chicho, Dominican Republic
  • MineMinas Chico Rei, Brazil
  • ShowcaveLa Caverna de Chicoy, Guatemala
  • ShowcaveChi Day Caves, Vietnam
  • ShowcaveGrotte du Chien, France
  • ShowcaveChifley Cave, Australia
  • KarstCenote Chihuo-Hol, México
  • CaveChikura Cavern, Japan
  • CaveChilibrillo Cave, Panama
  • ShowcaveChillagoe Caves, Australia
  • ShowcaveChinhoyi Cave, Zimbabwe
  • CaveChiquibul Cave System, Belize
  • SubterraneaChislehurst Caves, Great Britain
  • 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
  • MineSchieferbergwerk Grube Christine, Germany
  • MineChrustenická Šachta, Czech Republic
  • 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
  • ShowcaveChýnovská jeskyně, Czech Republic
  • 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
  • CaveCísařská jeskyně, Czech Republic
  • 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.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
  • MineColeman Rock Shop & Crystal Mines, United States of America
  • CaveColes Cave, Barbados
  • 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
  • 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
  • KarstLas Conchas, Guatemala
  • CaveConch Bar Caves, Turks and Caicos Islands
  • 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
  • CaveCooper's Cave, United States of America
  • SubterraneaCopán, Honduras
  • ShowcaveCoral Caverns, United States of America
  • ShowcaveAntro del Corchia, Italy
  • CaveCorfu Cave Tour, Greece
  • MineSentiero e gallerie minerarie del Cornacchino, Italy
  • SubterraneaGrottes du Cornadore, France
  • CaveCorner Brook Cave, Canada
  • 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
  • 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
  • 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
  • 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
  • SubterraneaSubterranean Crusader City, Israel
  • CaveCrvena Stijena, Montenegro
  • KarstCrveno Jezero, Croatia
  • ShowcaveCrystal Cave, United States of America
  • ShowcaveCrystal Caves, 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 Underground City, 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
  • 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
  • SubterraneaDaciyan, China
  • 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
  • CaveDamawewe, Papua New Guinea
  • ShowcavePeştera Dambovicioara, Romania
  • SubterraneaDambulla, Sri Lanka
  • ShowcaveDamlatas Magarasi, Turkey
  • ShowcaveDan-yr-Ogof - National Showcaves Centre for Wales, Great Britain
  • ShowcaveDandak Gufa, India
  • CaveDaneilshöhle, Germany
  • CaveDanger Cave, United States of America
  • MineDannemora Gruvor, Sweden
  • ShowcaveDarband Cave, Iran
  • KarstDarby's Cave, Antigua & Barbuda
  • ShowcaveGrotte de Dargilan, France
  • SubterraneaLa Mina de Daroca, Spain
  • MineMiniere di Darzo, Italy
  • KarstDashiwei Tiankeng, China
  • KarstDat Taw Gyaint Waterfall, Myanmar
  • ShowcaveDat Taw Taung Cave, Myanmar
  • MineDaugbjerg Kalkgruber, Denmark
  • ShowcaveHang Dau Go, 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
  • KarstDean's Blue Hole, Bahamas
  • MineCentral Deborah Gold Mine, Australia
  • SubterraneaDe Castellane, 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
  • SubterraneaDeinhard Kellermuseum, Germany
  • SubterraneaDeir Muqallik, Israel
  • 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 Underground City, Turkey
  • SubterraneaDerlon Hotel Museum Cellar, Netherlands
  • SubterraneaDesert Cave Hotel, Australia
  • ShowcaveDeSoto Caverns Park, United States of America
  • 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
  • SpringDevil's Den, United States of America
  • CaveDevil's Den Cave, United States of America
  • CaveDevil's Den, United States of America
  • KarstDevil's Hole, Bermuda
  • CaveDevil's Icebox Cave, 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
  • 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
  • SubterraneaDigger's Dream Underground Home, Australia
  • ShowcaveDike Paku Gupha, Nepal
  • ShowcaveDiktaion Antron, Greece
  • ShowcaveDiktaeon Cave, Greece
  • CaveDilek Magarasi, Turkey
  • ShowcaveDim Magarasi, Turkey
  • SubterraneaDimbulagala, Sri Lanka
  • ShowcaveDimnice Jama, Slovenia
  • CaveDinosaur Caves Park, United States of America
  • SubterraneaDino's Monstergrot, Netherlands
  • CaveCaverna del Dio Mithra, Italy
  • SpringFosse Dionne, France
  • GorgeGorges de la Diosaz, France
  • ShowcaveDiósgyör-Tapolca barlang, Hungary
  • SubterraneaDi Shui Dong, China
  • CaveDiu Diu Cave, Papua New Guinea
  • ShowcaveDivaška Jama, Slovenia
  • SpringDivje Jezero, Slovenia
  • ShowcaveDixie Caverns, United States of America
  • CaveĐalovića Pecina, Montenegro
  • CaveDjara Cave, Egypt
  • ShowcaveDjavolskoto Garlo Cave, Bulgaria
  • ShowcaveDjurovica Jama, Croatia
  • CaveDo-Ashcaft Cave, Iran
  • CaveDobakhol, India
  • 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
  • ShowcaveJaskyna Domica, Slovakia
  • SubterraneaDom Im Berg, Austria
  • ShowcaveGrotte de Domme, France
  • SubterraneaMuches de Domqueur, France
  • SubterraneaDOMunder, Netherlands
  • KarstDonauversickerung, Germany
  • ShowcaveCueva de Don Juan, Spain
  • CaveCueva de Don Justo, Spain
  • GorgeDonnersbachklamm, Austria
  • ShowcaveDoolin Cave, Ireland
  • GorgeDorfbachklamm, Germany
  • SubterraneaDorking Caves, Great Britain
  • GorgeDorohacchō Gorge, Japan
  • MineDorotheastolln, Germany
  • CaveDoseongul, South Korea
  • KarstCueva de las dos Puertas, Spain
  • MineMiniere di Dossena, Italy
  • ShowcaveGrotta dei Dossi, Italy
  • SpringSource du Doubs, France
  • SubterraneaDougout Ranch, United States of America
  • ShowcaveTham Doun, Laos
  • 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
  • ShowcaveJaskyna Driny, Slovakia
  • MineDrive-in Mine, Australia
  • ShowcaveSpilaio Drogkarati, Greece
  • SubterraneaLes Drois Glands, Luxembourg
  • KarstDruidenhain, Germany
  • CaveDubocka Pecina, Serbia
  • MineDucktown Basin Museum, United States of America
  • SubterraneaDudley Canal Tunnels, Great Britain
  • CaveLa Gruta Del Duende, México
  • MineHistorisches Kuperbergwerk Düppenweiler, Germany
  • SubterraneaDuivelsgrot, Netherlands
  • SpringDuman, Bosnia and Herzegovina
  • 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
  • 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
  • KarstEastwater Cavern, Great Britain
  • GorgeEbbor Gorge, Great Britain
  • CaveGrotte d'Ebbou, France
  • ShowcaveEberstadter Tropfsteinhöhle, Germany
  • ShowcaveGrottes des Echelles, France
  • GorgeEchidna Chasm, Australia
  • ShowcaveEcho Caves, South Africa
  • CaveEckert James River Cave, United States of America
  • CaveGruta dos Ecos, Brazil
  • MineEcton Mine Educational Centre, Great Britain
  • ShowcaveEdakkal, India
  • MineBesucherstollen Grube Edelstein, Germany
  • MineMina de El Eden, 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
  • MineEldorado Canyon Mine Tours, United States of America
  • SubterraneaElectric Mountain Visitor Centre, Great Britain
  • CaveGrutas el Encanto, Guatemala
  • SubterraneaElephanta Caves, India
  • 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
  • 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
  • GorgeEngenlochschlucht, Austria
  • MineSchieferbergwerk im Engi, Switzerland
  • ShowcaveEnglebrecht Cave, Australia
  • CaveEnku Bora, Japan
  • ShowcaveEnoshima Iwaya Cave, Japan
  • 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
  • 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
  • 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
  • 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
  • ShowcaveFengyu Cave, China
  • SubterraneaCisterne Romane Fermo, Italy
  • ShowcaveFern Grotto, United States of America
  • MineFern and Roman Caves, Great Britain
  • ShowcaveLa Ferrassie, France
  • MineFerreira's Mine, South Africa
  • 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
  • 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
  • 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
  • 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
  • MineFlascharův důl, Czech Republic
  • MineFlogbergets gruva, Sweden
  • ShowcaveGrotte 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
  • 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
  • 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
  • ShowcaveFort Rock Cave, United States of America
  • CaveFort Stanton Cave, United States of America
  • MineGrube Fortuna, Germany
  • 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
  • CaveSpilaion Frahthi - Frahthi Cave - Franchthi Cave, Greece
  • ShowcaveCueva de los Franceses, Spain
  • ShowcaveFrancetova Jama, Slovenia
  • 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
  • ShowcaveGrotta Grande del Vento - Grotte di Frasassi, Italy
  • CaveTempio del Valadier - Santa Maria di Frasassi - Infrasaxa - Grotte di Frasassi, Italy
  • SubterraneaHöhlenmuseum Frasdorf, Germany
  • CaveFrauenmauerhöhle, Austria
  • 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
  • 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
  • CaveFukui Cave, Japan
  • CaveFulford Cave, United States of America
  • KarstPortail de Fully, Switzerland
  • CaveGruta da Fumaça, Brazil
  • 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
  • CaveGruta da Furninha, Portugal
  • ShowcaveFurong Dong, China
  • ShowcaveFutenma Cave, Japan
  • ShowcaveFuyang Cave, China
  • MineSilberstollen Gabe Gottes, Germany
  • 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
  • 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
  • ShowcaveGardner Cave, United States of America
  • CaveSea Caves of the Gargano, Italy
  • ShowcaveGrottes Prehistorique de Gargas, France
  • 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
  • MineMines Prehistòriques de Gavà, Spain
  • MineParco Minerario Naturalistico di Gavorrano, Italy
  • ShowcaveGaxian Dong, China
  • SubterraneaGaziemir Yer Altı Şehri, Turkey
  • MineMestská a naftárska expozícia Gbely, Slovakia
  • CaveGcwihaba Caverns, Botswana
  • MineGeevor Tin Mine, Great Britain
  • SubterraneaGeghard, Armenia
  • GorgeGeikie Gorge, Australia
  • 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
  • SubterraneaGerman Underground Hospital, Great Britain
  • SubterraneaGerman Military Underground Hospital, Great Britain
  • SubterraneaGerman Naval Signals Headquarters, Great Britain
  • SubterraneaLa Grotta Dei Germogli, Italy
  • MineCarriere souterraine de Gèromont, Belgium
  • 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
  • ShowcaveGrotta Gigante, Italy
  • CaveLa Cueva del Gigante, Honduras
  • SubterraneaCuevas del Gigante, Spain
  • SpringGihon Spring, Israel
  • CaveGila Cliff Dwellings, United States of America
  • GorgeGilfenklamm, Italy
  • CaveGiligili Cave, Papua New Guinea
  • 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
  • ShowcaveGrotta Giusti Terme, Italy
  • CaveGjabakkahellir, Iceland
  • ShowcaveGrotte de la Glacière, France
  • CaveCave of Padre Glandorff, México
  • MineGrube Glasebach, Germany
  • KarstTravertine Terrasses in the Glatt Valley, 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
  • 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
  • SubterraneaTajemnicze Podziemne Miasto Gluszyca, Poland
  • MineSchaubergwerk „Gnade Gottes Erbstollen“, Germany
  • MineGo Below Underground Adventures, Great Britain
  • 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
  • CaveJama Golubinka, 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
  • MineGoldmine Gondo, Switzerland
  • ShowcaveGoa Gong, Indonesia
  • 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
  • MineEcomuseo Miniere di Gorno, Italy
  • KarstGort River, Ireland
  • ShowcaveGossi Cave, South Korea
  • ShowcaveGosu Cave, 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
  • ShowcaveLes Grandes Canalettes, France
  • KarstGrand Gulf State Park, United States of America
  • ShowcaveGrotte du Grand Roc, 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
  • 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
  • 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
  • SubterraneaGrottenaquarium, Netherlands
  • SubterraneaHöhlenburg Grottenstein, Switzerland
  • CaveThe Grotto, Australia
  • CaveThe Grotto, Northern Mariana Islands
  • 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
  • CaveBarranco de Guayadeque, Spain
  • MineMagic White Caves of Gudvangen, Norway
  • 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
  • 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
  • ShowcaveHaan Gul, South Korea
  • SubterraneaHabis Caves, Lebanon
  • SubterraneaHack Green Secret Nuclear Bunker, Great Britain
  • MineHadeland Bergverksmuseum, Norway
  • CaveHadži-Prodanova Pecina, Serbia
  • GorgeHaga Tingshus Jättegryta, Sweden
  • 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
  • ShowcaveHakuun-do, Japan
  • SubterraneaMithrasgrotte, Germany
  • MineBergbaumuseum Hall, Austria
  • SubterraneaHalliggye Fogou, Great Britain
  • MineHallstatt, Austria
  • SubterraneaHal 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
  • CaveHang Son Doong, Vietnam
  • SubterraneaHanibe Caves, Japan
  • MineHannan's North Tourist Mine - The Mining Hall Of Fame, Australia
  • SubterraneaHantongshan Shenxian Dong, China
  • 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
  • SpringHarod Spring, Israel
  • 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 Hasan, 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
  • SubterraneaHazan Caves, Israel
  • CaveHazrat Daud Cave, Uzbekistan
  • ShowcaveHeaven Cave, The Philippines
  • MineBesucherbergwerk "Heilige Drei Könige", Germany
  • MineGoldgräberdorf Heiligenblut, Austria
  • 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
  • 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
  • MineHelvetisches Goldmuseum, Switzerland
  • CaveHenneth Annûn, Middle-Earth
  • MineGalleria Henry, Italy
  • CaveHenry Morgan's Cave, Bahamas
  • ShowcaveHerbstlabyrinth-Adventhöhle-System, Germany
  • ShowcaveGrottes d'Hercules, Morocco
  • 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
  • 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
  • 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
  • ShowcaveHito-ana, Japan
  • GorgeHitonhauta, Finland
  • SpringVyvieračka Hlbokô, Slovakia
  • MineDůl Hlubina, Czech Republic
  • MineBanský Skanzen v Hnilčíku, Slovakia
  • SubterraneaHobbiton, New Zealand
  • MineSchaubergwerk Hochfeld, Austria
  • ShowcaveHochkarschacht, Austria
  • CaveHocking Hills State Park, United States of America
  • MineHodge Close, Great Britain
  • 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
  • CaveHohler 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
  • 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
  • MineHonister Slate Mine, Great Britain
  • 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
  • ShowcaveHoshino-no ana, Japan
  • SubterraneaHospital Cave, Vietnam
  • 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
  • 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
  • SpringHoward Springs, Australia
  • ShowcaveHowe Caverns, United States of America
  • GorgeHow Stean Gorge, Great Britain
  • KarstHranická propast, Czech Republic
  • ShowcaveHtan San Cave, Myanmar
  • CaveGruta de Huagapo, Perú
  • GorgeHuangchuan Three Gorges, China
  • ShowcaveHuanglong Dong, China
  • KarstHuanglong, China
  • ShowcaveHuánglóng dòng, China
  • ShowcaveHuangzhu Dong, China
  • SubterraneaHuashan Quarries, China
  • SubterraneaHuayan Temple, China
  • ShowcaveHuayangdong, 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
  • MineHull Rust Mine, United States of America
  • Showcave'Ana Hulu, Tonga
  • 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
  • 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
  • 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
  • SubterraneaInstituto Geológico y Minero Español, Spain
  • CaveIgnateva Pestera, Russia
  • 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
  • ShowcaveSpilia Illithias - Cave of Ilithias, Greece
  • CaveLa Grotte (Illetas Club Playa), Spain
  • CaveIllinois Caverns, United States of America
  • KarstIl-Maqluba, Malta
  • CaveIlsenhöhle, Germany
  • 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
  • ShowcaveIncirli Cave, Cyprus
  • Showcaveİncirliin Mağarası, Turkey
  • MineIndependence Mine, United States of America
  • SubterraneaMuseum of Independence, Bangladesh
  • 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
  • ShowcaveGrotta dell'Onferno, Italy
  • 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
  • MineIronbridge Gorge Museum, Great Britain
  • MineIron Mountain Iron Mine, United States of America
  • ShowcaveIshigaki Do, Japan
  • ShowcaveGrotte Is Janas, Italy
  • SubterraneaCava d'Ispica, Italy
  • ShowcaveVoragine di Ispinigoli, Italy
  • CaveIstállós-kői-barlang, Hungary
  • ShowcaveLes Grottes Isturitz et Oxocelhaya, France
  • SpringPeştera Isverna, Romania
  • ShowcaveGrotte Is Zuddas, Italy
  • GorgeItaimbezinho Canyon, Brazil
  • SubterraneaItäkeskuksen Uimahalli, Finland
  • SubterraneaIvanovo Rock Churches, Bulgaria
  • MineIwami Ginzan, Japan
  • SubterraneaIwamuro Kannon, Japan
  • ShowcaveIwaya shōnyūdō, Japan
  • SubterraneaIwaya Kannon Cave, Japan
  • CaveIwaya Kannon, Japan
  • SubterraneaIwayayama Cave, Japan
  • SubterraneaIzumizaki Cave Tomb, Japan
  • ShowcaveIzuru shonyudo, 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
  • CaveJarnan Cave, Oman
  • SubterraneaPodziemna Trasa w Jarosławiu, Poland
  • 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
  • ShowcaveMagharet Jeita, Lebanon
  • MineMina do Jeje, Brazil
  • CaveJelovačka Pećina, Montenegro
  • 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
  • ShowcaveJiguandong, China
  • SubterraneaJihlavské podzemí, Czech Republic
  • ShowcaveJillabenan Cave, Australia
  • ShowcaveJing Dong Da Rong Dong, China
  • CaveJingemia Cave, Australia
  • ShowcaveJiulongdong, China
  • ShowcaveJiutian Dong, China
  • ShowcaveYiyuan Jiutian Cave, China
  • KarstJiuxiang Scenic Resort, China
  • ShowcaveJiuxiao Biyundong, China
  • CaveJobitzinaj Cave, Guatemala
  • MineŠtola Johannes, Czech Republic
  • GorgeJohannesbachklamm, Austria
  • KarstJohannisfelsen, Germany
  • CaveGoa Jomblang, Indonesia
  • ShowcaveJomon shonyudo, Japan
  • SubterraneaGrottes de Jonas, France
  • SubterraneaJordan Creek Underground Tours, United States of America
  • 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
  • ShowcaveCavernas de Jumandi, Ecuador
  • SubterraneaJunagadh Caves, India
  • ShowcaveJunction Cave, Australia
  • CaveJungfernhöhle, Germany
  • MineJunkundar Coal Mine, India
  • SubterraneaJurnet's Bar, Great Britain
  • ShowcaveGrutas de Juxtlahuaca, México
  • KarstJvari Pass Travertine, Georgia
  • CaveKaaiman's Grotto, South Africa
  • CaveKaaterskill Falls, United States of America
  • CaveKachargadh Caves, India
  • SpringTermálny Prameň Kaďa, Slovakia
  • ShowcaveMagharet Qadisha, Lebanon
  • SubterraneaCave Church Kadjenica, Serbia
  • 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
  • CaveAna Kai Tangata, Chile
  • ShowcaveKaiyuan Cave, China
  • CaveAna Kakenga, Chile
  • ShowcaveKaklik Mağarası, Turkey
  • GorgeGorges de Kakuetta, France
  • CaveKakushöhle, Germany
  • ShowcaveKalabera Cave, Northern Mariana Islands
  • CaveGoa Kalisuci, Indonesia
  • CaveKalkstensgrottor, Sweden
  • SubterraneaAusweichsitz Nordrhein-Westfalen, Germany
  • CaveHohler Stein, Germany
  • SubterraneaEmmi Cheese Cave Kaltbach, Switzerland
  • KarstKarstlehrpfad Kaltbrunnental-Brislachallmet, Switzerland
  • GorgeKamarai Gorge, Greece
  • CaveSpilaio Kamares - Cave Kamaron - Kamares Cave, Greece
  • 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
  • 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
  • CaveMogharet el Kantara, Egypt
  • ShowcaveKantun Chi Caves, México
  • CaveKanze Limestone Cave, Japan
  • ShowcaveTham Kao Rao, Laos
  • SubterraneaBunker am Kap Arkona, Germany
  • 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
  • SubterraneaKarla Caves, India
  • CaveKarlamanska Cave, Russia
  • SubterraneaKarl-May-Höhle, Germany
  • ShowcaveKarlyuk Caves, Turkmenistan
  • CaveGrotta della Gavetta e Grotta del Pilone, Italy
  • ShowcaveGrutas Karmidas, México
  • 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 - Katabothres, Greece
  • 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
  • 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 Underground City, Turkey
  • SubterraneaKazanluk Tomb, Bulgaria
  • SubterraneaBrouwerij De Kazematten, Belgium
  • CaveKazumura Cave, United States of America
  • 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
  • GorgeKesselfallklamm, Austria
  • SubterraneaKessler Kellerführungen, Germany
  • CaveKesslerloch, Switzerland
  • MineKeswick Mining Museum, Great Britain
  • SpringKeterisi Mineral Vaucluse, Georgia
  • ShowcaveMagharet Kfar Him, Lebanon
  • GorgeKhadzhokhskaya tesnina, Russia
  • ShowcaveTham Khamin, Thailand
  • SubterraneaKhandagiri Cave, India
  • SubterraneaCaves of Khandepar, India
  • CaveKhangkhui Mangsor, India
  • ShowcaveKhao Chang Hai Cave, Thailand
  • CaveTham Khao Khun Krathing, Thailand
  • ShowcaveTham Khao Kop, Thailand
  • CaveTham Khao Kriep Ngoen, Thailand
  • ShowcaveTham Khao Luang, Thailand
  • CaveTham Khao Mai Khew, Thailand
  • CaveTham Khao Ngoen, Thailand
  • ShowcaveTham Khao No, Thailand
  • ShowcaveKhao Tham Phra, Thailand
  • SubterraneaKhapra Kodiya Caves, India
  • SubterraneaKhareba Winery, Georgia
  • ShowcaveKhayon Cave, Myanmar
  • MineKhewra Salt Mines, Pakistan
  • ShowcaveTham Khlang, Thailand
  • SubterraneaKh'ndzoresk, Armenia
  • 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
  • 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
  • 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
  • SubterraneaCave Church Klösterl, 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
  • MineKalkbergwerk am Königsberg, Germany
  • MineDe Beers Open Mine, South Africa
  • MineGrube Marie in der Kohlbach, Germany
  • CaveKohlerhöhle, Austria
  • MineKohtla-Järve Põlevkivimuuseum, Estonia
  • ShowcaveKojima 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 Baiyun Cave, China
  • CaveKonispol Cave, Albania
  • MineKonnerud Gruver, Norway
  • MineSchacht Konrad, Germany
  • MineKonungastollen, Sweden
  • ShowcaveKooringa Cave, Australia
  • MinePodziemne Muzeum "Kopalnia Zlota" w Zlotym Stoku, Poland
  • MineStora Kopparberget, Sweden
  • MineKoppartorp, Sweden
  • ShowcaveKoppenbrüllerhöhle, Austria
  • KarstKamara tou Koraka Natural Bridge, Cyprus
  • CaveKorallgrottan, Sweden
  • MineKorkinsk Coal Mine, Russia
  • CaveKorsanini Mağarası, Turkey
  • CaveKorykio Andro - Corycian Cave, Greece
  • ShowcaveKöşekbükü Mağarası, Turkey
  • MineSlovenské Technické Múzeum, Slovakia
  • ShowcaveKostanjevica Jama, Slovenia
  • ShowcaveKounoubwa Cave, Haiti
  • GorgeKourtaliotiko Gorge, Greece
  • ShowcaveSpilia Koutouki - Koutouki Cave, Greece
  • SpringKovači, 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
  • CaveKrálova jeskynĕ, 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
  • MineKromdraai Gold Mine, South Africa
  • CaveKrompirjeva Jama, Slovenia
  • CaveCastello di Mezzocorona, Italy
  • SubterraneaHöhlenburg Kropfenstein, Switzerland
  • MineGraphitbergwerk Kropfmühl, Germany
  • ShowcaveKrška jama - izvir Krke, Slovenia
  • KarstKrushuna, Bulgaria
  • 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
  • CaveKühlloch, Austria
  • SpringKuhfluchtwasserfälle, Germany
  • CaveFiery Caves of Kuhi-Malik, Tajikistan
  • CaveKuhstall, Germany
  • CaveKula Kai Caverns, United States of America
  • 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
  • ShowcaveKurasawa Shonyudo, Japan
  • SubterraneaKurjey Lhakhang, Bhutan
  • GorgeKurobe Gorge, Japan
  • MineHrádek a důl Osel Kutná Hora, Czech Republic
  • ShowcaveKutumsar Gufa, India
  • 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
  • ShowcaveGrotte de Labeil, France
  • SubterraneaBudavári Labirinthus, Hungary
  • SubterraneaLabirinto di Porsenna, Italy
  • ShowcaveRiv. Souterraine de Labouiche, France
  • SubterraneaLabyrinth pod Zelným trhem, Czech Republic
  • GorgeLabyrinthe, Luxembourg
  • 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
  • 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
  • MineHistorische Kupferzeche am Larzenbach, Austria
  • MineLa Salina, Spain
  • ShowcaveGrotte de Lascaux, France
  • SubterraneaLas Cuevas, Spain
  • ShowcaveCueva de las Manos, Argentina
  • MineLas Médulas, Spain
  • ShowcaveCueva de Las Palomas, Spain
  • KarstBalneario Las Pozas, Guatemala
  • MineLast Chance Mining Museum, United States of America
  • 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
  • CaveLa 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
  • CaveLeamington 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
  • ShowcaveLedenika, Bulgaria
  • ShowcaveLedge View Nature Center, United States of America
  • CaveLedová jeskynĕ, Czech Republic
  • MineCanadian Energy Museum, Canada
  • MineTechnisches Denkmal Historischer Schieferbergbau 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
  • MineEisenerzgrube Lengede-Broistedt, Germany
  • MineGrube Lengenbach, Switzerland
  • GorgeLennard River Gorge, Australia
  • CaveLenore Caves, United States of America
  • SubterraneaLenyadri Caves, India
  • 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
  • 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
  • SubterraneaPertouse de Leytro, Switzerland
  • KarstLi'angahuo 'a Maui, Tonga
  • CaveLiang Bua Cave, Indonesia
  • ShowcaveLiánhuā dòng, China
  • ShowcaveLianzhou Underground River Scenic Area, China
  • CaveLiar's Cave, Bulgaria
  • CaveLībiešu upuralas, Latvia
  • SubterraneaLiboriusklause, Germany
  • SubterraneaLice Ashâb-ı Kehf Mağarası, Turkey
  • 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
  • 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
  • CaveLinkenboldhöhle, Germany
  • CaveLinno Gu, Myanmar
  • SpringLintvern, Slovenia
  • ShowcaveLinville Caverns, United States of America
  • ShowcaveLion's Cave, China
  • MineLion Salt Works, Great Britain
  • CaveLipci Cave, Montenegro
  • 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
  • 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
  • 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
  • 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
  • KarstLonglin Shihai, China
  • ShowcaveLong Men Dong, China
  • SubterraneaLongmen Grottoes, 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
  • MineMuseu Mineiro do Lousal, Portugal
  • MineLa Louvière, Belgium
  • 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
  • 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
  • CaveLumiang Cave, The Philippines
  • CaveGruta Luminosa, Brazil
  • ShowcaveLummelundagrottan, Sweden
  • CaveLuobi Cave, China
  • ShowcaveLuojishan Fairy Cave, China
  • ShowcaveLuō mèi liánhuā dòng, China
  • 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
  • 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
  • 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 Madelaine, France
  • CaveAbri la Madelene, 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
  • 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
  • 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
  • ShowcaveCueva de la Majahua, México
  • 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
  • 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
  • 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
  • SubterraneaMangupKale, Russia
  • ShowcaveManita pećina, Croatia
  • SubterraneaManitou Cliff Dwellings, United States of America
  • ShowcaveManjang Gul, South Korea
  • ShowcaveManjushree Gufa, Nepal
  • 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
  • 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
  • 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
  • SubterraneaBaños de Doña María de Padilla, Spain
  • CaveGruta da Maria Encantada, Portugal
  • 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
  • SubterraneaMarkt Höhler, Germany
  • ShowcaveMark Twain Cave, United States of America
  • MineBesucherbergwerk Markus Semmler, Germany
  • SubterraneaMonastery of Mar Lishaa, Lebanon
  • ShowcaveMarmarospilia, Greece
  • CaveCatedral de Marmol, Chile
  • CaveCaverna do Maroaga, Brazil
  • SubterraneaDomačija Marof, Slovenia
  • SubterraneaMaropeng, South Africa
  • SubterraneaLes Caves de Marson, France
  • CaveMarstrand Caves, Sweden
  • SubterraneaG.H. Martel et C°, France
  • MineMartha Mine, New Zealand
  • 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
  • MineMascot Mine, Canada
  • CaveCuevas del Masical, Honduras
  • 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
  • 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
  • ShowcaveMau Mau Caves, Kenya
  • CaveMauna Loa Tree Molds, United States of America
  • MineDůl Mauritius, Czech Republic
  • CaveMavri Spilia - Black Cave, Greece
  • CaveMavri Spilia - Black Cave, Greece
  • ShowcaveKrem Mawsmai, India
  • MineBergbau-Schaustollen Max, Germany
  • ShowcaveGrottes de Maxange, France
  • ShowcaveMaximiliansgrotte, Germany
  • SubterraneaMaximushöhle - The "Catacombs" of Salzburg, Austria
  • MineMayener Grubenfeld, Germany
  • SubterraneaMazi Underground Settlement, Turkey
  • KarstMcConnell Springs, United States of America
  • SubterraneaMcGregor's Cave, Great Britain
  • ShowcaveMeadowcroft Rockshelter, United States of America
  • ShowcaveJaskinia w Mechowie, Poland
  • MineMecsek Bányászati Múzeum, Hungary
  • SubterraneaGruta de la Virgen de la Medalla Milagrosa, Argentina
  • CaveMedicine Rocks State Park, United States of America
  • 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
  • CaveMegali Spilia, Greece
  • SubterraneaMega Spiléo - The Great Cave, Greece
  • SubterraneaMeidan Bazar, Georgia
  • ShowcaveMejiro-do, Japan
  • SubterraneaMelek-Chesmensky Kurgan, Russia
  • ShowcaveSpilaio tou Melidoniou, Greece
  • ShowcaveLimni Melissani, Greece
  • MineMusée des Mines d'Argent des Rois Francs, France
  • CaveMellieħa Cave and Spring, Malta
  • 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
  • SubterraneaBalma del Messere, Italy
  • ShowcaveGrottes de Beaume les Messieurs, France
  • CaveMészégető-forrásbarlang, Hungary
  • MineTrassbergwerk 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
  • 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
  • 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
  • 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
  • SubterraneaMincmistrovský sklep, 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
  • 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
  • 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
  • ShowcaveGrotta del Miracolo, Italy
  • ShowcaveGrutas de Mira de Aire, Portugal
  • KarstPolje de Mira-Minde, Portugal
  • SpringMiskolc-Tapolca, Hungary
  • MineMission Mine, 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
  • SubterraneaMithraeum, Italy
  • SubterraneaMithraeum San Clemente, Italy
  • ShowcaveMitsugo shonyudo, Japan
  • SubterraneaMittelbau Dora - Mittelwerk Dora, Germany
  • 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
  • ShowcaveGrotte 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
  • SubterraneaMuseum of Old and New Art, Australia
  • KarstMonasterio de Piedra Natural Park, Spain
  • 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
  • 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
  • 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
  • CaveMoqui Cave, United States of America
  • SubterraneaMoqui Sand Caves, United States of America
  • CaveTham Morakot, Thailand
  • MineSchaubergwerk Morassina, Germany
  • MineMorden Colliery, Canada
  • CaveMordloch, Germany
  • 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
  • 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
  • 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
  • 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
  • SubterraneaCistern of Ancient Mycenae, Greece
  • CaveJaskinia Mylna, Poland
  • SubterraneaRock-cut Tombs in Myra, Turkey
  • ShowcaveMystery Cave, United States of America
  • ShowcaveMystic Caverns, United States of America
  • MineZeche Nachtigall, Germany
  • SpringEl Nacimiento, México
  • 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
  • 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
  • ShowcaveTham Nang Ene, Laos
  • GorgeNanjiang Grand Canyon, 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
  • 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 State Resort Park, 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
  • ShowcaveNaung Mya Hlwe Cave, Myanmar
  • KarstVai Nauri, Cook Islands
  • ShowcaveNavenakhevi Cave, Georgia
  • MineNaypyitaw Gem Museum, Myanmar
  • 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
  • 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
  • ShowcaveNezhnaya Cave, Russia
  • ShowcaveNgarua Caves, New Zealand
  • ShowcaveNgilgi Cave, Australia
  • CaveNguom Ngao Cave, Vietnam
  • ShowcaveNhi Thanh Cave, Vietnam
  • ShowcaveNiagara Cave, United States of America
  • ShowcaveGua Niah, Malaysia
  • SubterraneaNiasar, Iran
  • ShowcaveGrotte de Niaux, France
  • 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
  • SubterraneaNilometer, Egypt
  • CaveNimara Mağarası, Turkey
  • KarstChaos de Nîmes-le-Vieux, France
  • CaveSt Ninian's Cave, Great Britain
  • ShowcaveGħar Ninu, Malta
  • ShowcaveNippara shonyudo, Japan
  • 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
  • MineThe No. 9 Mine & Museum, United States of America
  • MineNobesawa Ginkodo, Japan
  • CaveNoccalula Falls, United States of America
  • ShowcaveNodong Cave, South Korea
  • 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
  • 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
  • ShowcaveAmabera ga Nyinamwiru, Uganda
  • CaveGrotte aux Nymphes, Switzerland
  • MineNyvångs kolgruva, Sweden
  • MineOberharzer Bergwerksmuseum, 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
  • SubterraneaOdessa Catacombs, Ukraine
  • MineOdin Mine, Great Britain
  • 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
  • CaveUamh an Oir, Great Britain
  • SpringOja de Agua, México
  • SubterraneaEkspozycja Przyrodnicza Ojców, Poland
  • ShowcaveOjika-do, Japan
  • SpringOjo de Agua, México
  • SubterraneaOjo Guareña, Spain
  • SubterraneaOjukwu Bunker, Nigeria
  • GorgeOkatse Canyon, Georgia
  • ShowcaveCave Okinawa, Japan
  • MineOkubo Mabu Mine, Japan
  • CaveCaverna de la Olada, Perú
  • 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
  • GorgeCheile Oltețului, Romania
  • CaveOlumo Rock, Nigeria
  • MineOlympic Dam Mine, Australia
  • KarstGorges d'Ombleze, France
  • CaveOmuru Flying Fox Cave, Papua New Guinea
  • ShowcaveOnagara shonyudo, Japan
  • ShowcaveCueva de Oñati-Arrikrutz, Spain
  • ShowcaveOndaldong Gul, South Korea
  • GorgeOneota Gorge, United States of America
  • 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
  • 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
  • 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
  • CaveCaverna Ouro Grosso, Brazil
  • SubterraneaLe Musée de l'Ours de Cavernes, France
  • ShowcaveOutlaw Cave Tours, United States of America
  • MineOutokummun Kaivosmuseo, Finland
  • 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
  • ShowcaveOziđana pećina, Croatia
  • ShowcaveGrotta di San Michele, Italy
  • SubterraneaÖzkonak Yeralti Şehri, Turkey
  • SubterraneaOzluce Underground City, 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
  • CaveGruta Dos Paiva, Brazil
  • ShowcaveTham Pak Ou, Laos
  • MinePalabora Copper Mine, South Africa
  • CaveGruta del Palacio, Uruguay
  • CaveCueva Palacio del Rey, Perú
  • MineMinas Do Palácio Velho, Brazil
  • CavePalaha Cave, Niue
  • CaveGrotta Palazzese, Italy
  • SubterraneaMitreo di Palazzo Barberini, Italy
  • CaveGrotta di Pale, Italy
  • SubterraneaPaleo Stone Age Gunungkidul, Indonesia
  • CaveCueva de Palestina, Perú
  • SpringPalfauer Wasserloch, Austria
  • SubterraneaCementiri de Palma, Spain
  • ShowcaveCueva del Palmarito, Cuba
  • SubterraneaPalmaz Vineyards, United States of America
  • SubterraneaPalm Jumeirah Underpass, United Arab Emirates
  • SubterraneaPalombaro Lungo, Italy
  • CaveGrotta delle Palombe, Italy
  • ShowcavePálvölgyi Barlang, Hungary
  • SpringPamukkale, Turkey
  • ShowcaveCueva de los Panaderos, Cuba
  • SubterraneaPanagia Chrysopiliotissa Church, Cyprus
  • SubterraneaChurch of Panagia Evangelistria, Cyprus
  • 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
  • CavePanhulugan Cave II, The Philippines
  • CavePanhulugan Cave I, The Philippines
  • SpringPanias Spring, Israel
  • 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
  • SubterraneaParc de la Préhistoire, France
  • SubterraneaCova des Pardals, Spain
  • SubterraneaMusée des Egouts de Paris, France
  • CaveParis Ice Cave, United States of America
  • SubterraneaMétro de Paris, France
  • SubterraneaParkhöhle Weimar, Germany
  • MinePark City Silver Mine Tour, United States of America
  • SubterraneaPark Tunnel, Great Britain
  • SubterraneaParque de la Prehistoria, Spain
  • 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
  • ShowcaveGrotte de Pech Merle, France
  • CaveJama Pečinka, Slovenia
  • CaveCasa de Pedra, Brazil
  • CaveGruta da Pedra da Santa, Brazil
  • SpringPegnitzquelle, Germany
  • ShowcavePeik Chin Myaung Cave, Myanmar
  • MineBergbaumuseum Peißenberg, Germany
  • ShowcaveJama Pekel, Slovenia
  • CaveSpilaio sta Pelekita - Sikias Spilios - Cave of Pelekita, Greece
  • CavePelion barlang, Hungary
  • CaveShpella e Pëllumbasit, 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
  • ShowcaveSpelaio Peramatos - Perama Cave, Greece
  • ShowcaveA Visit of Perama Cave, Greece
  • CaveGrotte du Père Noël, Belgium
  • SubterraneaMusée d'Art et d'Archéologie du Périgord, France
  • 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
  • SubterraneaLa Petite Perrière, France
  • ShowcaveLa grotte des Petites-Dalles, France
  • ShowcavePetnicka Pecina, Serbia
  • SubterraneaPetra Cave City, Jordan
  • ShowcaveSpilaio Petralona - Kókkines Pétres, Greece
  • 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
  • CavePecina kod Petrusa, 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
  • 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
  • ShowcaveCueva de la Pileta - Pileta Cave, Spain
  • 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
  • SubterraneaPiper Heidsieck, France
  • ShowcaveLa Cueva del Pirata, Spain
  • CavePirate's Caves, Cayman Islands
  • CavePiripiri Cave, New Zealand
  • GorgePirkner Klamm, Austria
  • CavePirunkirkko, Finland
  • SubterraneaPiscina Mirabilis, Italy
  • SubterraneaPitalkhora Caves, India
  • CaveGrotte Piteschkummer, Luxembourg
  • CavePiula Cave Pool, Samoa
  • SubterraneaPiusa Koopad, Estonia
  • ShowcavePivka Jama and Crna Jama, Slovenia
  • SubterraneaPiyamit Tunnel, Thailand
  • SubterraneaPJ's Underground, Australia
  • ShowcaveTham Pla, Thailand
  • CaveGrotte du Placard, France
  • ShowcaveGrottes des Planches, France
  • ShowcavePlaninska Jama, Slovenia
  • KarstPlaninska Polje, Slovenia
  • CaveTham Pla, Thailand
  • MinePlatteville Mining Museum, United States of America
  • SpringSpring von Plaue, Germany
  • MineAlaunbergwerk Ewiges Leben Plauen, Germany
  • CavePlava pećina, Montenegro
  • KarstPlaya Escondida, México
  • MinePleasley Colliery, Great Britain
  • SubterraneaPleven Wine Museum, Bulgaria
  • KarstPlitvička Jezera, Croatia
  • SubterraneaRegional Natural History Museum, Bulgaria
  • CavePluto's Cave, United States of America
  • SubterraneaPlzeňské historické podzemí, Czech Republic
  • MinePocahontas Exhibition Coal Mine, United States of America
  • SubterraneaMuzeum Zimnej Wojny Podborsko 3001, Poland
  • MineKopalnia Podgórze, Poland
  • KarstGrotta della Poesia, 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
  • 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
  • GorgeGorges du Pont du Diable, France
  • CaveGrotte de la Pontoise, France
  • SubterraneaLe patrimoine souterrain de Pontoise, France
  • 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
  • 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
  • CaveCueva del Puente, Dominican Republic
  • KarstPuentedey Puente Natural, Spain
  • CavePuente del Diablo, Argentina
  • 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
  • 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
  • SubterraneaPusté Kostely, Czech Republic
  • ShowcaveGoa Putri Kencono, Indonesia
  • CaveTham Pu Wai, Thailand
  • CaveHöhlenschoß Puxer Luegg, Austria
  • CaveQala Qala, Bolivia
  • SubterraneaQanat Gesuitico Alto, Italy
  • SubterraneaQanat Gesuitico Basso, Italy
  • SubterraneaQanat di Palermo, Italy
  • ShowcaveQianren Cave, China
  • KarstQifeng Cave, China
  • ShowcaveQiliang Dong, China
  • ShowcaveQilin Cave, China
  • KarstQilin Cave Park, China
  • KarstQingkou Tiankeng, China
  • SubterraneaQingtian Hall, China
  • CaveQixia Shan, China
  • ShowcaveQixing Yan, China
  • CaveQuackenschloß, Germany
  • SubterraneaOur Lady Of Quannoubine Monastry, Lebanon
  • ShowcaveCueva de la Quebrada del Toro, Venezuela
  • MineQueen Mine Tour, United States of America
  • SubterraneaQueen City Underground, United States of America
  • 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
  • MineRabensteiner Stollen, Germany
  • 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
  • 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