These caves are regularly sought out by tourists because they have been featured in a number of Hollywood productions. The movie Invasion of the Body Snatchers and TV shows like Bonanza, Gunsmoke, Star Trek, Batman and Robin, Mission Impossible, and a number of lower-budget films have all bee filmed at the caves.Tourists can access the caves for free and they are open during daylight hours. The cave location is just a few minutes from downtown Hollywood and many of the production companies is Los Angeles. They are located in Griffith Park, one of the most well-known and frequently photographed areas in LA. The caves are the result of the Union Rock Company's quarry, dug in 1903 and used to mine the resources used to build the streets in Hollywood. The quarry ended its run of mining during the 1920's, which opened the door to it being used for movies and television shows. The caves are sometimes called the Bronson Canyon. Those who would like the visit the caves should travel to Griffith Park and find parking near the area cordoned off before the Hollywood sign. You can then take the short hike across the bridge and up to the canyon from there.