Lac Souterrain de Saint-Léonard

A staircase leads down into a huge underground cave with a boat landing stage. The lake impresses with its clear water, in which large fish and water plants can be seen. Two sunken boats also lie in the water. The cave has a special acoustic quality, which makes sounds ring out in a particular way. During the guided boat tour, the fish can be fed. Admission costs 12 francs per person; booking online in advance is recommended.