Watch A Day on Treasure Island (1939) : Full Movie Online Free This Traveltalks entry visits the Golden Gate International Exposition. Sponsored by 11 western states of the United States and 28 foreign countries, this "world's Fair of the West" was built on Treasure Island, a man-made island in San Francisco Bay. Viewers see the exteriors of many exhibition halls and the pavilions of foreign nations. The art, sculpture, and flowers on display are also featured.