Bluebeard

Arguably, the first bona-fide horror film ever made. The scene where the wife goes to the cellar and finds the hanged bodies of the previous wives is genuinely chilling, and the eerie dream scene is very well done.

There is really no exaggerating of Georges Méliès' importance in the history of cinema, inventor of special effects, an early expressionist before expressionism even officially existed, a wizard creator of magical worlds, a canny surrealist a full two decades before surrealism was even born, a trickster and relentless comedian that knows no bounds: more than an innovator, Méliès is a genius.