This is where the collection water from the largest cave system in the Doubs department comes from. Depending on the weather, sometimes more, sometimes less or not at all after a long period of drought.
Creux Billiards - is a remarkable karst cauldron with a beautiful waterfall.
The whole also forms an underground cave system with the neighboring source - Source du Lison. It is best to visit after long rains.
A few km after its source, the Lison flows between gorges. Its bed is punctuated by small tuff waterfalls very distant from each other, which thus form vast expanses of calm water between each waterfall. a quiet and beautiful place.