Teufelsberg was the second place documented by Abandoned Berlin. “Did you hear about that abandoned spy station on a mountain in West Berlin?”

It was amazing. The first photos below are from 2009, and you can see how it progresses (deterioration offset by street art) over the years.

Once you’re finished reading the story of Teufelsberg, don’t forget to check out Lew McDaniel’s account of what it was like to work at the spy station.