When I visited the Amager Bakke, the power plant + ski hill (no, really!) in Copenhagen, besides the ski slope not being open yet (we unfortunately visited just a scant month or so before completion), there was this other odd thing they were adding to the side of the building. I didn’t realize what it was at the time, but turns out it’s a giant climbing wall. And I do mean giant. The building is tall enough for a ski slope… so this thing is 85 meters (280 feet) tall! It’s so tall it’s a 4 pitch lead/sport climb only, and requires a multi-pitch certification just to climb it’s 4 lanes (8 routes total). Amazing.