Prora is a beach resort on the island of Rügen, Germany, known especially for its colossal Nazi-planned tourist structures. The massive building complex was built between 1936 and 1939 as a Strength Through Joy (Kraft durch Freude or KdF) project. The eight buildings were identical, and although they were planned as a holiday resort, they were never used for this purpose. The complex has a formal heritage listing as a particularly striking example of Third Reich architecture.