Does Aquarius still live in one of the ponds near Zellerfeld? Can you still see the walls of his Crystal Palace shimmering in the water? Walk with one of our expert World Heritage Guides on an exciting journey of discovery through the world of the Upper Harz legends and of course also on an exploratory tour through the Upper Harz Water Management System. Based on the old Harz legend of Aquarius you will also get to know the World Heritage, its method of function, its creators and the uses of this unique energy system.