Bronson Canyon is a section of Griffith Park in Los Angeles, California that has become famous as a filming location for a very large number of movies and TV shows, especially westerns and science fiction, from the early days of motion pictures to the present. Its craggy and remote-looking setting, but easily accessible location, has made it a prime choice for filmmakers, particularly of low-budget films, who want to place scenes in a lonely wilderness.
The famous hill and cave setting is on the western side of the park. In 1903, the Union Rock Company founded a quarry for excavation of crushed rock, used in the construction of city streets. The quarry ceased operation in the late 1920s, leaving the caves behind. Scenes of the main cave entrance are normally filmed in a manner that shows the entrance at an angle. This is because the cave is actually a very short tunnel through the hill, with the rear opening easily visible in a direct shot. The most well known appearance of the tunnel entrance is likely as the entrance to the Batcave in the Batman television series of the 1960s.
Well, you had to get into the Batcave somehow, why not from where the exteriors were shot for Robot Monster? The film was shot and projected in dual-strip, polarized 3-D. The stereoscopic photography in the film is considered by many critics to be of a high quality.
