San Diego Botanical Garden - Reflecting Pool Balboa Park is a primary attraction in San Diego and the region. The park's gardens include Alcazar Garden, Botanical Building, Desert Cactus Garden, Casa del Rey Moro Garden, Inez Grant Parker Memorial Rose Garden, Japanese Friendship Garden, Bird Park, George W. Marston House and Gardens, Palm Canyon, and Zoro Garden. 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. Wiki