Andrew Bossi · CC BY-SA 2.5 Why visit
A navigable underground lake in a cave between Sion and Sierre, visited by guided boat. A visit is centred on underground boat route, cave walls and subterranean water, so the place can be understood through concrete features rather than only as a photograph stop. Its setting in Saint-Léonard also connects it with the wider character of Valais. Allowing time for the principal feature and its immediate surroundings gives useful context for travellers interested in nature, geology, lake. It pairs naturally with other nearby sights in the same region while retaining enough historical, cultural or landscape interest to justify a dedicated visit.
What you will see
- underground boat route.
- cave walls.
- subterranean water.
History
The cave lake became accessible for organised visits in the mid-twentieth century after geological changes altered the water level. It occupies a gypsum and limestone setting within the Rhône valley.
Photographs
Andrew Bossi · CC BY-SA 2.5 · full attribution on the image credits page.
Visitor tips
- 1
Allow enough time for the principal feature and its immediate setting rather than treating the stop only as a photograph point.
- 2
Use the current official destination or operator information for access, maintenance, weather and seasonal changes.
About Valais
Matterhorn country, the Aletsch glacier system and the historic Rhône valley around Sion and Martigny.
Open the Switzerland guide
