Other silent witnesses to the war, prominently visible in this very flat city, are the artificial hills built from the rubble of thousands of destroyed buildings. Two of them, in East Berlin’s Friedrichshain and West Berlin’s Humboldthain Parks, partially cover massive flak towers that were the scourge of British and American bomber crews. It is widely known that West Berlin’s highest hill, “Devil’s Mountain,” is also made of rubble.
