Go on a family trip for the weirdest trip, just go to the Center of the Earth ... Here is a treasure hunt designed primarily for children accompanied by their parents or supervisors. Come help the descendants of "Pépé Marcel" to get their hands on a fabulous hidden treasure deep in the cold and dark galleries. Riddles, surprises and other codings await the adventurers during this real adventure. Underground activity requiring imperatively a warm clothing (12 ° permanently) a head covering to protect the head of the variations of height of the vault for the big ones and good hiking shoes. All other necessary materials are available on site.