Smithsonian Gardens
Washington, D.C., United States · built 1972
The Smithsonian Gardens, a division of the Smithsonian Institution, is responsible for the "landscapes, interiorscapes, and horticulture-related collections and exhibits", which serve as an outdoor extension of the Smithsonian's museums and learning spaces in Washington, D.C. Established in 1972 as a groundskeeping and horticulture program, Smithsonian Gardens currently manages 180 acres of gardens on the National Mall, 64,000 square feet of greenhouse production space, and the Archives of American Gardens, a research collection of over 60,000 photographs and archival records covering American landscape history from the 1870s to the present.
Garden data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).