Dementia is a strange Film Noir horror film from 1955. No spoken dialog, but only haunting music and a nice Jazz score accompany disturbing footage of a woman gone mad.
Häxan is a silent film and an early horror classic. Its sub-title is Witchcraft Through the Ages. It shows torture, witch hunts, superstition and more.
Onibaba: A highly unsettling B&W film about the struggle for survival in the grasslands outside Kyoto during a big war. With the occasional pinch of horror.