In another quirk of fate, actress
Susan French (Elderly Elise) was born in 1912 (same year as the film) after her parents honeymooned at the Hotel del Coronado, which is where Richard Matheson originally intended the movie to be filmed. He wrote the original book, "Bid Time Return", while staying at the Del. Unfortunately, the Del is surrounded by modern condos, which special effects of the time weren't sophisticated enough to remove, so someone suggested the Grand, built the same year as the Del, and the rest is history.