In the heart of the Vercors Regional Natural Park, the clear waters of the Furon, the freshness and tranquility of the underground world, will make you forget the time of a walk, the urban proximity. Located in the middle of a preserved fauna and flora, the Vats can be discovered through guided tours, thematic animations and other speleological walks with the Accrogrotte®. You can explore the heart of the Vercors and discover the legend of the Fairy Melusine in this underground universe where time has no hold...

Open from 01/05 to 31/10.
The visit is subject to weather conditions (floods). Ask for information before you arrive.

More information on their website

And if I go by bus ?

Take the line T64 Grenoble - Engins - Villard-de-Lans and get off at the stop "Place de la Libération" in Sassenage.