
Photo : Wikimedia Commons
Gouffre de Poudrey
It could contain Notre-Dame cathedral of Paris! Giving access to an immense hall that gives us from the entrance the feeling of entering a sacred place, the Poudrey chasm takes us 70 metres below ground. During a 45-minute underground walk, you discover a true geological phenomenon through its formation and interior dimensions, 1 MILLION CUBIC METRES. It is to date the largest developed in France.





