Hotel of Secrets (German: Hotelgeheimnisse) or The Adventuress from Biarritz (Die Abenteurerin von Biarritz) is a 1929 German silent film directed by Friedrich Feher and starring Gertrud Eysoldt, Magda Sonja and Angelo Ferrari. It was shot at the Staaken Studios in Berlin and on location in Biarritz. The film's art direction was by Ernst Meiwers and Ernö Metzner.