Teufelsberg
2019 (Germany)
A beautiful climb up a man made hill in West Berlin takes you to this former spy station overlooking the whole of the city. I hope to visit again once the viewing platforms are accessible - currently forbidden for safety reasons.
You may also enjoy the following galleries:
Johannisthal Airfield
Flughafen Tempelhof
Chemiewerk (Part 1)
The Soldier's Village