From Wikipedia:
This was the first and last Prana-Film GmbH film — the company declared bankruptcy after Bram Stoker's estate, acting for his widow, Florence Stoker, sued for copyright infringement and won. The court ordered all existing prints of Nosferatu destroyed, but copies of the film had already been distributed around the world. These prints were then copied over the years, helping Nosferatu gain its current reputation as one of the greatest movie adaptations of the vampire legend.
With the influence of producer and production designer Albin Grau, the film established one of two main depictions of film vampires. The "Nosferatu-type" is a living corpse with rodent features (especially elongated fingernails and incisors), associated with rats and plague, and neither charming nor erotic but rather totally repugnant. The victims usually die and are not turned into vampires themselves. The more common archetype is the "Dracula-type" (established by Bela Lugosi's version of Dracula and perpetuated by Christopher Lee), a charming aristocrat adept at seduction and whose bite turns his victims into new vampires.
Parts of the film depicting Transylvania were in fact filmed in Slovakia. Nosferatu's castle, for instance, is Orava Castle in northern Slovakia, and other locations are in the High Tatras and on the Váh River around Strečno Castle.
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