Name Location Canton Notes Col des Roches Caves [ fr ] Le Locle Neuchâtel Show cave with subterranean watermills at Col des Roches , close to the France–Switzerland border Grotte aux Fées Saint-Maurice Valais Show cave, contains an underground waterfall Grotte de Cotencher Rochefort Neuchâtel Contained Neanderthal skeletal remains, arifacts Grotte du Bichon La Chaux-de-Fonds Neuchâtel Contained Cro-Magnon skeletal remains Höllgrotten [ de ] [ 2] Baar Zug Grotto at Lorzentobel (ravine of the river Lorze ), a show cave Hölloch Muotathal Schwyz Show cave, second longest cave in Europe Kesslerloch Thayngen Schaffhausen Contained Paleolithic artifacts Kristallhöhle Kobelwald [ de ] [ 3] Oberriet St. Gallen Show cave Lamberta Caves [ fr ] [ 4] Môtier Fribourg 200 metres [660 ft] long tunnel built during World War I Réclère Grottos [ fr ] [ 5] Réclère Jura Accessible grotto, part of the Prehisto-Park, with life-sized dinosaur figures Saint Beatus Caves [ de ] [ 6] Beatenberg Bern Show cave, named after Irish/Scottish-born monk and hermit Beatus of Lungern Saint-Léonard underground lake Saint-Léonard Valais Show cave, contains Europe's largest subterranean lake Schweizersbild Schaffhausen Schaffhausen Rock shelter, contained paleolithic art and skeletal remains Siebenhengste-Hohgant-Höhle Eriz , Beatenberg , Habkern Bern Not accessible to the public Wildenmannlisloch Wildhaus-Alt St. Johann St. Gallen Accessible, contained prehistoric remains Wildkirchli Schwende-Rüte Appenzell Innerrhoden Accessible, located at Ebenalp . Contained prehistoric remains