Teufelsberg

is a man-made hill in Berlin, Germany, in the Grunewald locality of former West Berlin. It rises about 80m above the surrounding Teltow plateau and 120.1m above the sea level, in the north of Berlin's Grunewald Forest. It was named after the Teufelssee in its southerly vicinity. The hill is made of rubble, and covers an under-construction Nazi military-technical college . During the Cold War, there was a U.S. listening station on the hill, Field Station Berlin.HistoryTeufelsberg is a man-made hill, created in the 20 years following the Second World War by moving approximately 75000000m3 of debris from Berlin.After the Communist putsch in the city parliament of Greater Berlin (for all four sectors of Berlin) in September 1948, separate parliaments and magistrates (link=no; city government) were formed for East and West Berlin. This also ended much of the cooperation between West Berlin and the state of Brandenburg, surrounding West Berlin in the North, West and South.While part of the rubble from destroyed quarters in East Berlin was deposited outside the city boundary, all the debris from West Berlin had to be dumped within the western boundary. Due to the shortage of fuel in West Berlin, the rubble transport stopped during the Berlin Blockade.