Route 27 is closed for large events held at the Pentagon including the annual Marine Corps Marathon and the Army Ten-Miler. A number of points of interest are visible from the highway, including (from west to east) Fort Myer (which was the site of the first military test flight), Henderson Hall (the headquarters of the United States Marine Corps), the United States Air Force Memorial, the Pentagon, the Navy Annex, the Pentagon Memorial, the Pentagon City Mall, and Arlington National Cemetery.