La Balme les Grottes - Balme Caves

(Local Name: Grottes de la Balme) The Balme Caves are ranked as one of the Seven Marvels of Dauphine and have been inhabited since prehistoric times. The site was used as a sacrificial altar, but was later sanctified and made into a chapel by François I. The caves include a 35 meter high porch, a lake, several pools, limestone formations, and numerous rooms, some of which wind like mazes. There is also a dinosaur exhibition on site.