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.

[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.

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