The Los Angeles County Arboretum & Botanic Garden
http://www.arboretum.org/
Occupying the heart of the historic Rancho Santa Anita, The Los Angeles County Arboretum & Botanic Garden is a unique 127 acre botanical garden and historical site jointly operated by the Los Angeles Arboretum Foundation and the Los Angeles County Department of Parks and Recreation and located in the city of Arcadia. Home to plant collections from all over the world, including many rare and endangered species, The Arboretum also houses outdoor historical landmarks representative of the major phases of California history