Ruhleben internment camp was a civilian detention camp in Germany during World War I. It was located in Ruhleben, a former Vorwerk manor 10 km (6.2 mi) to the west of Berlin. This area is now split between the districts of Spandau and Charlottenburg-Wilmersdorf. The camp was developed on the site of a harness racing track laid out in 1908 north of the Berlin-Hamburg Railway line.