Travel Guide Saint Léonard

Saint-Léonard has 2,400 inhabitants. This small municipality in the Valais near Sion is home to a very special geological curiosity: the largest navigable underground lake in Europe. Open to tourists since 1949, some 80,000 visitors discover the immense 300-metre long and 20-metre wide lake by boat every year. The trout that can be seen there were introduced by man. Although the first mention of Saint-Léonard dates from the 11th century, the site has been inhabited since Antiquity. Numerous remains dating from the first and second Iron Ages as well as from the Roman period have been discovered there