View of the Botanical Building with the Lily Pond and Lagoon in the foreground. The building was designed by architects Bertram Goodhue and Carleton M. Winslow, Sr., and built for the 1915-1916 Panama California Exposition. It is one of the largest lath structures in the world, measuring 250 feet long, 75 feet wide, and 60 feet tall, made with spaced louvers to allow light to penetrate the 2,000+ plants inside. It originally included a long steel and glass greenhouse projecting from the back of the central portion, now removed.