Rising up to 80 meters, this man-made hill was created after World War II from the debris of Berlin's destroyed buildings. You can still see a former US listening station on the top. The area has become a popular day-trip destination - enjoy biking, hiking or just chilling on the slopes.
Wikipedia https://en.wikipedia.org/wiki/Teufelsberg
More information http://www.visitberlin.de/en/spot/teufelsberg
Address 14193 Berlin, Germany
Coordinates 52°29'51.786" N 13°14'34.635" E