Das Blaue Licht (aka The Blue Light) (1932)

Set in the Swiss Italian alps, a strange and mystical mountain girl (Leni Riefenstahl) is thought to be a witch by the people of her village. She has the ability to climb a treacherous mountain from which a mysterious blue light emanates every full moon that defeats the young men of the village who feel compelled to climb the mountain but inevitably fall to their deaths. A German tourist (Mathias Wieman) arrives and his effect on the girl and the mystery of the blue light brings dire consequences. Loosely based on the novel BERGKRISTALL by Gustav Renker (who receives no credit in the film) and directed by the notorious Leni Riefenstahl (TRIUMPH OF THE WILL). This mythical tale was shot entirely on location. It's not so much the film's narrative that is fascinating but Riefenstahl's incredible compositions, fluid camera work and editing which was far more advanced than what was being done in American sound cinema at that time and all of which imparts a sense of pastoral serenity and bucolic enchantment covering up a conspiracy of rancor. Reputedly one of Hitler's favorite films. With Franz Maldacea.