Some of the soundtrack is taken from the TV series The Outer Limits (1963), such as the scene where John Carradine approaches the cemetery, just before his death scene.
Filmed in and around the Kearns Mansion which is also the Governor's mansion in Salt Lake City Utah. In 1993 a Christmas tree standing in the center hall rising several stories caught fire and the mansion had to be restored at a cost of $8M. Scenes filmed inside can be compared with historical photos.