S.O.S. Eisberg (1933) is a German-American mountaineering drama about an arctic expedition searching for a lost party, led by Professor Karl Lorenz. The rescue party itself becomes stranded on a giant, drifting iceberg after Lorenz foolishly goes off alone, leading to a dangerous survival struggle. The film features real footage of Greenland and stars Leni Riefenstahl as an aviatrix and Lorenz's wife, who attempts a rescue but also crashes.