The greater San Francisco Bay Area offers its residents and visitors a rich and varied gift of gardens and botanical research facilities. University of California (UC), Berkeley, is one, with its 34 acres and over 12,000 international plants available for enjoyment and study. The Arboretum at UC Santa Cruz is another such offering. Also, Ruth Bancroft's Garden of 4 acres of sustainability in Walnut Creek sets the standard for drought resistant botanical planning, and Tilden Regional Park's Botanic Garden of 10 acres represent just a few of the gifts to the public.