Smithsonian Pollinator Garden 
Constitution Ave NW
Washington, DC 20560
202-633-1000
https://gardens.si.edu/gardens/pollinator-garden/
Botanical Garden: Picnic, Walk
The Smithsonian Butterfly Habitat Garden is 11,000 square foot area that supports plant species having specific relationships to life cycles of eastern United States butterflies. It is located on the East side of the National Museum of Natural History at 9th Street between Constitution Avenue and the National Mall in Washington, DC.