A rock outside and inside, a monolith like a natural stone, that is the expression of the rock climbing hall. In the interior the walls are covered with wooden panels, to offer the rock climbers a wide range on difficulties for their tours. The maximum climbing height in this huge hall is 15m, in the lower boulder area they find a cave–like atmosphere.
Outside the walls are covered with a horizontal, folded wooden façade, that shows the image of a rock in an even more abstract way. The asymmetric roofs increases the monolithic impression of the building.