Sankt Hans Gade basketball bane
Basketball field, but build for skaters as well. Small banks for skateboarders, but also has a really nice wooden rail a little over knee height. On top of that, there's also a knee high granite bench.
Go to Sankt Hans Torv in Nørrebro, Copenhagen. Go down Sankt Hans Gade (past the long rail). When you hit the next crossing, it'll be to your right.