Geological sites

The Valais is home to some of the most impressive gorges, caves and grottos in the Alps. Whether by suspended bridge, gallery or boat, exploring the dark grottos and deep gorges of the Valais is an absolutely thrilling experience. This unique and magical world was shaped over millions of years by the immense forces of nature. And not only are the gorges and grottos spectacular in themselves – the story of their discovery has fascinated visitors for decades.

Underground lake
Sierre, Salgesch and surroundings Sierre, Salgesch & surroundings Switzerland
The mysterious cavern was discovered in 1943 by Jean-Jacques Pittard, but the lake was not open to the public until 1949. The St. Leonard underground lake is the largest of its kind in Europe: it is 300m long and 20m wide. The boat trip to the lake lasts over half an hour and can accommodate up to 40 people (commentary is available in several languages). A superb terrace provides a magnificent view of Valère and Tourbillon castles, in addition to a view of the whole Rhone valley up to Martigny. Underground lake
Sierre, Salgesch and surroundings
Sierre, Salgesch and surroundings

Underground lake

The mysterious cavern was discovered in 1943 by Jean-Jacques Pittard, but the lake was not open to the public until 1949. The St. Leonard underground lake is the largest of its kind in Europe: it is 300m long and 20m wide. The boat trip to the lake lasts over half an hour and can accommodate up to 40 people (commentary is available in several languages). A superb terrace provides a magnificent view of Valère and Tourbillon castles, in addition to a view of the whole Rhone valley up to Martigny.

Season:
March - November