Balboa Park (San Diego) an outdoor amphitheatre. The Casa Del Prado Theater is the home of San Diego Junior Theatre, the country's oldest children's theatre program. The House of Pacific Relations International Cottages collected on El Prado offer free entertainment shows. The Botanical Building, designed by Carleton Winslow, was the largest wood lath structure in the world when it was built in 1915 for the Panama-California Exposition. It contains large specimen palms and other plants and sits next to a long reflecting pool on the El Prado side. Located in the eastern third of the park is the Morley Field Sports Complex, which includes
Balboa Park (San Diego) Center in 1973. The 1915–1916 exposition's Food and Beverage Building was rebuilt and reopened in 1971 as Casa del Prado. Balboa Park, and the historic Exposition buildings, were declared a National Historic Landmark and National Historic Landmark District in 1977, and placed on the National Register of Historic Places. The following year two historic park structures burned down in two separate arson fires: the Aerospace Museum in the former Electric Building, and the 1935 Old Globe Theatre. The Aerospace Museum (now the San Diego Air and Space Museum) lost over $4 million in exhibits, and was reopened after moving into