63 km | 80 km-effort
"On the ground floor: presentation of the formation of the caves and caverns. Upstairs exposition of objects discovered during the excavations carried out in the Grotto of Han (a place of funeral cult during the Age of Bronze) and in the bed of the River Lesse during the past 50 years, from Neolithic to Modern times. A last hall is dedicated to renditions of the grotto from 1770 until 1914."
