The Hearst Castle has only been used once for a movie set. They used the outdoor Neptune pool for a scene in Spartacus. This movie does show exteriors of the Hearst Castle but any interiors must have been filmed somewhere else. Either England or Canada. Did I say Virginia Madsen was young? Well Robert Mitchum is old! But somehow they are both convincing as lovers. Shows what good acting is all about. The supporting cast could have used a little more star power. Who was that guy playing Charlie Chaplin? Marian Davies had a terrific career in movies both before & after the introduction of sound & I don't think that comes across.