Bernstein Bielefeld

Warning: While this roof looks super awesome, its only entry point is a restaurant, which also has full vision onto said roof. It looks very cool and tempting, but I doubt that anyone can train there longer than five minutes before the police arrives. And since there is also only one exit this location sadly seems impossible to visit.

If someone manages to train there, the rooftop is pretty big, has a lot of obstacles and goes even further than the pictures show