Balboa Park is a 1,200-acre urban cultural park in San Diego, California. Located in the heart of San Diego, the park is home to numerous attractions, including the world-famous San Diego Zoo, the San Diego Air & Space Museum, the San Diego Natural History Museum
From Wikipedia
Balboa Park is a 1,200-acre (490 ha) historic urban cultural park in San Diego, California. Placed in reserve in 1835, the park's site is one of the oldest in the United States dedicated to public recreational use. The park hosts various museums, theaters, restaurants, and the San Diego Zoo. It is managed and maintained by the Parks and Recreation Department of the City of San Diego.