Built for the 1915 -- 16 Panama -- California Exposition , it remains one of the largest lath structures in the world .
The Botanical Building is an historic building located in San Diego 's Balboa Park , in the U.S. state of California .
Built for the 1915 -- 16 Panama -- California Exposition , Botanical Building remains one of the largest lath structures in the world .
The Botanical Building is an historic building located in San Diego 's Balboa Park , in the U.S. state of California .