The surrounding forest is the starting point for URA to design a simple building which contains all confrontations of the site : open vs. closed, trees vs. slope, materiality vs. transparency, building vs. environment. The gymnasium is dug into the natural slope. The facade shows the duality of the context : a strong, closed concrete wall on the one side and a wooden structure with a black steel plates cladded facade on the other side. These two facades meet in the perspective of the stage-stair. The surrounding trees are seen from different perspectives. “Going to the gym” confronts the pupils (again) with the basic elements of nature.