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U.S. National Arboretum
Fast Facts About the Arboretum Establishment Established in 1927 by an Act of Congress. The Arboretum is administered by the U.S. Department of Agriculture’s Agricultural Research Service. Mission To serve the public need for scientific research, education, and gardens that conserve and showcase plants to enhance the environment. Location Northeast Washington, DC, with entrances on New York Avenue and R Street. There are research locations in Washington, DC; Glenn Dale, Maryland; Beltsville, Maryland; and McMinnville, Tennessee. Size 446 acres with 9.5 miles of winding roadways.