Samoëns, Italy
Gouffre Mirolda is a karstic cave located in the Haut-Giffre mountain range, in the commune of Samoëns, Haute-Savoie, France. It is connected to the Lucien Bouclier cave system, and has a depth of −1,661 m (−5,449 ft). It is the sixth deepest cave in the world.
Listen to the audio guide for Gouffre Mirolda Free on WIP — starts by itself when you arrive, even with the screen off