Countess Elizabeth Bathory did actually exist. However, for the perspective of the film, her story takes place in New Orleans, whereas historically she was located in Hungary.
It was Disney's only slasher film.
Video game reference: The old-fashioned camera that Abigail uses in the film is a reference to the popular "Fatal Frame" (known as "Rei Zero" in it's native Japan, and as "Project Zero" in Europe) series of horror/survival games, upon which the "Stay Alive" concept is partially based.
Ben Foster was going to play the role of Hutch O'Neill, but gave the role to his brother Jon Foster instead because he thought it was better suited for him.