The University of Washington Botanic Gardens is a unit within the School of Environmental & Forest Sciences and encompasses two sites: the Washington Park Arboretum on the south side of Union Bay and the Center for Urban Horticulture on the north side. The 230-acre Arboretum includes a vibrant collection of more than 40,000 living plants from around the world with opportunities to explore woods, wetlands, and take in exceptional views. The Center for Urban Horticulture includes demonstration gardens and natural areas, and also houses the Elisabeth C. Miller Horticultural Library, Otis Douglas Hyde Herbarium, and the Washington Rare Plant Care and Conservation Program. Both sites offer excellent opportunities for exercise, exploration, and wildlife viewing.