Balboa Park is a 1,200-acre (490 ha) historic urban cultural park in San Diego, California, United States. In addition to open space areas, natural vegetation zones, green belts, gardens, and walking paths, it contains museums, several theaters, and the San Diego Zoo. There are also many recreational facilities and several gift shops and restaurants within the boundaries of the park. Placed in reserve in 1835, the park's site is one of the oldest in the United States dedicated to public recreational use. Balboa Park is managed and maintained by the Parks and Recreation Department of the City of San Diego.

The Panama–California Exposition was a world exposition held in San Diego, California, between January 1, 1915, and January 1, 1917. The exposition celebrated the opening of the Panama Canal, and was meant to tout San Diego as the first United States port of call for ships traveling north after passing westward through the canal. The fair was held in San Diego's large urban Balboa Park. The park held a second Panama-California exposition in 1935.