Topics

• Accessibility
• Atlantikwall
• Bears' Caves, the home of cave bears.
• Blue Grottos, sometimes green...
• Caves Used as Road Tunnels, or sometimes railway tunnels.
• Cave Castles, a very special usage of natural caves: to build castles inside.
• Cave Trekking Tours aka wild caving with a guide, where you can do a little caving yourself.
• Cave Visits By Tram.
• Cliff Dwellings of the U.S. West
• Dragon Caves. Or do you not believe in Dragons?
• Gypsum Caves and Mines, all sites related to gypsum.
• Gateways to Hell
• Caves with Paintings, which are open to the public.
• The Subterranean World Heritage List, a subset of the UNESCO WHL.
• Caves With a View, have a look!
• World War I