The Lockwood-Mathews Mansion Museum location was used in the original Dark Shadows television show.
The graveyard set was inspired by the original Wolfman and Frankenstein films.
The heart-shaped transition is a reference to the old Looney Tunes cartoons (especially Pepe Le Pew).
The "hand from the grave" shot is a reference to the Evil Dead films.
Rachel Dratch's character is inspired by Norma Desmond from Sunset Blvd.