Open daily from March 19th
10AM to 5PM – Last tour 5pm
In July and August 9AM to 5.30 PM – Last tour 5.30 PM


  Adults Fr. 10.-

Children 5 – 15 years Fr.6.-

Children under 5 year old are free


Duration of the tour is around 30 minutes and the temperature in the cave is 15 Celsius.
Tours start all day long, every 20 to 40 minutes.
No prior booking needed for individual travelers. Groups over 20 people might book in advance.
In the morning, the first tour starts about 20 minutes after the first visitors arrive.
All tours are guided tours on a boat with explanations in English, French and German.
Other languages on request depending on availability.
Pictures without flash allowed. It is not possible to access the cave on foot. Swimming and diving are not permitted.