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  • April 11, 1973. The United States National Arboretum is an arboretum in northeast Washington, D.C., operated by the United States Department of...
  • The United States National Arboretum is a significant green space located in Washington. It is operated by the United States Department of...
  • The United States National Arboretum is a major institute for botanical research and has satellite locations in Maryland and Tennessee.
  • ...full of buildings, streets and Metro stops but for those looking for a quiet getaway inside the district's borders, head to the United States National Arboretum.
  • United States National Arboretum, arboretum in Washington, D.C., operated by the U.S. Department of Agriculture.
  • The United States National Arboretum was formally established by an act of Congress on 4 March 1927.
  • In 1973, the United States National Arboretum was officially declared as a Category II landmark on the National Register of Historic Places.
  • What to see and do at the U.S. National Arboretum? The Arboretum presents a stunning collection of plants, with each given its own display.
  • Washington, DC. United States. ... The National Arboretum was listed in the National Register of Historic Places in 1978.