Premise: Stillwater Cove Regional Park is a regional park north of Jenner, California, U.S.A. that is maintained by the Sonoma County Regional Parks Department. It is located near the mouth of Stockhoff Creek. Access is by means of State Route 1. It was one of the filming locations for 20th Century Fox's 1947 fantasy film, "The Ghost and Mrs. Muir".
Hypothesis: The film was released before the fifties.