This year PrehistoHan is highlighting the underwater excavations carried out on the bed of the Lesse and at the exit from the Cave of Han. Films, models and photos take you down with the divers, into the murky waters of the river, to the discovery of one of Belgium's most fabulous archaeological treasures. It's an adventure that started 50 years ago! Frequented by man for over 4,000 years, the Cave of Han has yielded up an impressive quantity of archaeological remains dating from the Late Neolithic to modern times. The best represented period is without doubt the Late Bronze Age. The quantity of objects discovered is such that it makes Han one of the most important sites in western Europe for this period. Come and discover these exceptional items in an attractive, interactive and fun presentation. The exhibition also includes a section dedicated to the natural sciences: geology, the formation of the caves and concretions and cave fauna. A large model of the massif of the caves, a presentation of the various networks of the cave system and an animation on the Lesse in spate round off the exhibition. Lastly, accompanied by Laura Craft, join in the archaeological excavations in the Cave of Han as if you were there! In the interactive cinema, put on your 3D glasses, grab your joystick and set off on an exploration of the secret galleries of the Cave of Han and its treasures. Duration : 45 min.