Vampyr - Der Traum des Allan Grey (1932)

This is one of the most beautiful - and most neglected - vampire films ever made. Shot in the French countryside, Vampyr follows a student of the occult into a gauzy dreamworld where an ancient female vampire has cast her deadly shadow over a dilapidated castle, home to an elderly man and his two beautiful daughters. 

Criterion recently released this masterpiece on DVD, complete with a full restoration and a detailed booklet about the film, pricey at $40, but VERY worth it. Amazon carries slightly cheaper copies, of course.

In the meantime, you can view the film in its entirety HERE.