interior of a brutalist former gymnasium transformed into a climbing hall raw exposed concrete structure visible demolition traces where floors and walls have been partially removed rough openings and cut edges in concrete large double height space created by removing part of the intermediate slab upper level walkway with simple railing and a door at the back wall overlooking the climbing area climbing surfaces are integrated into the existing structure as sculptural extensions of the concrete walls not separate elements irregular geometry growing out of the architecture left side large foldable glass facade fully opened connecting interior to outdoor sports field strong side daylight entering the space atmosphere raw unfinished architectural contrast between heavy existing concrete and precise new intervention realistic no people