FW Murnau’s 1922 silent film is a classic. It was meant to be the first film interpretation of Dracula, but they were never given permission to use the source material. So Murnau and his crew changed the names, locations, and a few other minor details and created one of the most haunting film's to ever grace the silver screen.
The film has been remade once in 1979, and was used as a setting for 2000's Shadow of the Vampire starring John Malkovich and Willem Dafoe. Shadow of the Vampire is a "making of" movie which also makes the star an actual vampire that attacks the cast and crew, and whose death is actually caught on film. This was a great tribute of source that breathed new life into original film, without disgracing it with an updated "talking" version like the 1979 version (which admittedly I have not scene).
I touched on this before, that some films are just too good to ever be remade. Nosferatu fits that bill. It's a horror film classic, and if you don't have to patience to sit through a silent film then it's your loss. What say you? Leave a comment on whether or not you agree, or other movies you feel fit the category of "should never be remade".