What is the name of the 4.2 acre public garden in the Smithsonian complex, adjacent to the Smithsonian Castle on the National Mall in Washington?
National Mall The National Mall is a national park in downtown Washington, D.C., the capital of the United States. The National Park Service (NPS) of the U.S. Department of the Interior administers the National Mall, which is part of its National Mall and Memorial Parks unit.
Thompson-Harding Monument Thompson-Harding Monument is a public artwork by an unknown artist, located at Rock Creek Cemetery in Washington, D.C., United States. "Thompson-Harding Monument" was originally surveyed as part of the Smithsonian's Save Outdoor Sculpture! survey in 1993.