Old Tucson is an American movie studio and theme park just west of Tucson, Arizona, adjacent to the Tucson Mountains and close to the western portion of Saguaro National Park. Built in 1939 for the movie Arizona (1940), it has been used for the filming of many movies and television westerns since then, such as Gunfight at the O.K. Corral (1957), Rio Bravo (1959), El Dorado (1966), and Little House on the Prairie TV series of the 1970s-1980s. It was opened to the public in 1960, and historical tours are offered about the movies filmed there, along with live cast entertainment featuring stunt shows and shootouts.