Courtesy of Youtube, a post-apocalyptic movie about two men and a woman vacationing in Puerto Rico, who appear to end up the only survivors left on earth, that creates an interesting love triangle, in a fight for the last woman. Low-budget, granted, but with some great location scenery, and social commentary in a world where wealth no longer matters.
Robert Towne (as the lawyer) went on to be an Oscar-winning screenwriter. Another from Roger Corman, who had a long run of entertaining low-budget S-F films.
Another movie that preceded it, The World, The Flesh, and the Devil (1959), explores similar themes, with the twist of one of the last 3 being a black guy (played by Harry Belafonte) where despite the world being gone, perceptions of race still endure even though the former world is gone.
