House of Dark Shadows (1970)

Jonathan Frid, Grayson Hall, Joan Bennett
Directed by Dan Curtis
IMDB

Sunset Blvd. (1950)

Gloria Swanson, William Holden
IMDB

Incubus (1965)

William Shatner, Allyson Ames, Eloise Hardt, Ann Atmar
IMDB
All the spoken dialogue is in Esperanto. Here is a entertaining clip from the Daily Show about this one time lost film and language.

The Changeling (1980)

George C. Scott, Melvyn Douglas
IMDB

Burnt Offerings (1976)

Karen Black, Oliver Reed, Bette Davis, Burgess Meredith
Directed By Dan Curtis
IMDB
I took a tour of the Dunsmuir-Hellman Historic Estate where this was filmed last weekend in Oakland California. The Mansion has been in films like this film Burnt Offerings and Phantasm.
I highly recommended taking one of their tours if you are ever in the area.
http://www.dunsmuir.org/
The Mansion Today:

Salome (1923)

Alla Nazimova, Rose Dione, Mitchell Lewis, Nigel De Brulier, Earl Schenck
based on the play by Oscar Wilde
costumes + sets designed by Natacha Rambova, after the drawings of Aubrey Beardsley
IMDB