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) uniforms, and much of the park was filled with plantings of exotic plants. Over 40,000 red Poinsettia plants, all in full bloom, were used. The event attracted the national attention organizers had sought. Even Pennsylvania's Liberty Bell made a brief three-day appearance in November 1915. The event was such a success the fair was extended through 1916. Over the two years, it drew more than 3.7 million visitors, including Henry Ford, William Jennings Bryan, Thomas Edison, Theodore Roosevelt, and William Howard Taft. The expo actually turned a slight profit, which was donated to the San Diego Museum in the park.