The Lost Valley (German: Das verlorene Tal) is a 1934 German-Swiss drama film directed by Edmund Heuberger and starring Mathias Wieman, Marieluise Claudius and Harry Hardt.^[1] It is based on the 1931 novel of the same title by Gustav Renker.^[2] The film's sets were designed by the art director Hans Jacoby. Location shooting took place around Poschiavo in Switzerland.

A young man returns to his home village and discovers that his childhood sweetheart is now engaged to a civil engineer who also plans to flood his beloved woods to create a reservoir.

• Mathias Wieman as René von Eisten
• Marieluise Claudius as Verena Stettler
• Harry Hardt as Hans Alteggen
• Olaf Bach as Josi
• Lilliane Dietz as Yvonne d'Ivry
• Lotte Spira as Giovanna Stettler
• Wera Liessem as Lisa Amann
• Armin Schweizer as Blunzli
• Ferdinand Asper as Morgenthaler
• Armand Zäpfel as Rudi Boss

• Goble, Alan. The Complete Index to Literary Sources in Film. Walter de Gruyter, 1999.
• Waldman, Harry. Nazi Films in America, 1933-1942. McFarland, 2008.

• The Lost Valley at IMDb}