The Botanical Building and Lily Pond at Balboa Park in San Diego was built in 1915-1916 for the San Diego Exposition. They have over 2100 permanent plants including ferns, orchids, cycads, palms and other tropical plants. In the entirety of the park, the Botanical Building and Pond is one of the most photographed locations. I highly recommend visiting this place if you are ever in San Diego! :)