Spread over 4,000 acres, Griffith Park is the largest urban park in the United States and has been used as the backdrop for several movies, including "Batman" and "Jurassic Park." It houses the Griffith Park Observatory, and the Los Angeles Zoo. Also within the park are the Autry Museum of Western Heritage and the Travel Town Transportation Museum. Fifty-three miles of picturesque hiking trails as well as swimming, biking and horseback riding ensure something for everyone. Griffith Park is also home to the Hollywood sign, which stands on Mt. Lee.