National Arboretum - View this location on map The national arboretum of the United States, and an institution of world renown; a major element of the city's park system, established through the efforts of the Commission of Fine Arts, and closely associated with the work of noted landscape architect Frederick Law Olmsted, Jr.; probably the nation's largest urban arboretum at more than 400 acres; a nationwide center for research, education, and plant propagation, taking advantage of the city's congenial climatic zone at the juncture of North and South; a repository for international gifts; the site of the Latrobe columns from the U.S. Capitol East Portico, and significant archaeological remains; established by Congress in 1927; landscaping of the Mount Hamilton site begun by the Civilian Conservation Corps in the 1930s; fully laid out after a 1947-48 master plan by the Public Buildings Administration; opened to the public in 1949; major collections include Morrison Glen Dale Azalea Garden, Gotelli Dwarf Conifer Collection, National Boxwood Collection, National Bonsai and Penjing Museum, National Grove of State Trees, National Herb Garden, and other plantings of native and non-native trees, shrubs, and perennials. 3501 New York Avenue, NE, Washington , DC Historical

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