This Cold War spy station relic, standing tall on Devil's Mountain, has been abandoned for over ten years. Grab an inquisitive pal and discover where American soldiers interrogated political prisoners during the Cold War, witness the graffiti that adorns every free space and dangle from the rope swing hanging from the centre of the dome. Don't be afraid to climb the ladders up onto the building roofs; the view you are rewarded with is truly unbeatable. Teufelsberg is not like any other place you will have visited before. Follow the white spray-painted arrows from the U-bahn station for the 30-minute walk to the site.
10 Teufelsseechaussee, 14193.