The Teufelsberg is an artificial hill in Berlin-Grunewald, which was built on a former pile of rubble accumulated during the Second World War and the subsequent reconstruction period. The name "Teufelsberg" means "Devil's Hill" in German and refers to the fact that many people felt that it was impossible to remove so much rubble.

After the war, the hill was used by the US Army as a location for a listening station, which was part of the US counterintelligence system during the Cold War as part of "Field Station Berlin". The station was operated in the 1960s and had a series of huge radar antennas that were used both to monitor Soviet airspace and to intercept Soviet communications.

After the end of the Cold War and the withdrawal of the US army from Berlin, the listening station was disbanded and Teufelsberg was abandoned. Since then, the hill has become a popular tourist attraction and a favorite destination for hikers and graffiti artists. There is also a platform on the hill from which you have a breathtaking view of the city.

Today, Teufelsberg is a popular destination for tourists and Berliners who want to enjoy a unique view of the city and interesting insights into Berlin's history during the Cold War.