Mes favoris
Pas de favoris dans votre liste
qui vous convient:
Plan ahead
and book
your stay:

Saint-Léonard Underground Lake

The spectacular and unusual St-Léonard underground lake is the largest such lake in Europe.

300m long, 20m wide and 10m deep, this is the largest navigable underground lake in Europe.
Guided tours of this unusual and mysterious site, lasting over half an hour, are given in French, German, Italian and English.

Practical information

  • Adult : CHF 10.—
  • Children (5 to 15 years old) : CHF 6.—
  • Group from 20 people : CHF 9.—

Useful documents


Saint-Léonard Underground Lake
Rue du Lac 21
1958 St-Léonard
+41 27 203 22 66

Opening times

Open everyday from 19th March to 22nd September
Monday – Sunday : 10h00 – 17h00
In July and August : Monday Sunday : 09h00 – 17h30
By continuing to browse this site, you agree to the use of cookies to improve your user experience and to provide website statistics.
Read the legal notice