Though, for my money, Dr. Caligari himself is far creepier:
|Don't hate him because he's beautiful.|
Of particular note here are the sets. Rather than trying to capture any sort of realism, all the action of The Cabinet of Dr. Caligari takes place on purposefully-false and stagey hand-painted sets meant to evoke a sense of madness and fear. It's somewhat akin to seeing Edvard Munch's The Scream put to film.
It is, all in all, an astounding film experience. Which you can enjoy in its entirety... after the jump!