The Glensheen MansionFrom IMDB.com: 'Filmed at the Congdon Mansion in Duluth, MN. After the murder of mansion owner and prominent heiress Elisabeth Congdon in 1977, a movie theatre in Duluth revived the movie at midnight showings (much to the chagrin of the Congdon family).'
The historic Congdon Estate in Duluth, Minnesota, on the shore of Lake Superior