Teuifelsberg (German for Devil's Mountain). An abandoned and half ruined American/British Cold War radio listening station, on top of a hill of World War II rubble, piled on top of a Nazi academy - that's Berlin for you. Plenty of people slip through the fence to have a look, but the legal way to visit is on the informative weekly 3-hour tour. Guides tell about the importance of the work that was done there, espionage and counter-espionage, the extreme security measures and the excellent relations between the Allies and the West Berlin population. From the radar tower there are fantastic views across the whole city.
The 110 meter high mountain becomes a winter paradise when there is snow. There are three more or less official routes and many wild slopes. Whether someone prefers official routes or more adventurous wild slopes, it seems like this location has something for everyone, making it an attractive destination for winter activities.
