At the end of the 19th century, professor Fournier, geologist and hydrologist, arrived in Besançon and explored the swallow holes and caves in order to study the route water takes in a limestone plateau.
In doing this he discovered the Chasm of Poudrey.
In this chamber 70 metres underground, water has sculpted the rock into elegant stalactites and stalagmites.
This natural wonder is lit to look even more spectacular.
Accompanied by visual and sound effects, the visitor journeys across millennia, retracing the story of this exceptional site.
Admission prices :
Children from 5 to 12 years : 5.1 €
Students : 6.1 €
Full price : 7.1 €
Children up to 4 years : Free
From 13 to 18 years : 6.1 €