Lady Bird Johnson Park Lyndon Baines Johnson Memorial Grove on the Potomac Mount Vernon Trail Navy – Merchant Marine Memorial Netherlands Carillon Potomac Heritage Trail Riverside Park Roaches Run Waterfowl Sanctuary Spout Run Parkway Theodore Roosevelt Island Turkey Run Park U.S. Marine Corps War Memorial (Iwo Jima Memorial) Washington Sailing Marina Women in Military Service for America Memorial Information, brochures, maps, and stamps are in the Parkway headquarters located next to the US Park Police station in McLean, Virginia. The Park Police is the primary police agency responsible for patrolling the George Washington Parkway, the Clara Barton Parkway, and the above listed areas. Previously proposed connection The Clara Barton Parkway is administratively part of the George Washington Memorial Parkway. It was signed and designated as the George Washington Memorial Parkway until 1989, when it was renamed to overcome motorist confusion with the main segment in Virginia. The parkways on the two sides of the river were originally supposed to be joined by a bridge at the Great Falls of the Potomac River. However, opposition from preservationists led to the cancellation of that bridge. Instead, traffic between the two parkways uses the American Legion Bridge downstream. The Virginia side of the Potomac River at Great Falls is managed by the Superintendent of the parkway as a national park site, known as Great Falls Park. Some elements of the proposed final parkway configuration—such as the concrete bridge that would have carried northbound traffic at the Glen Echo turn-around—were built but have never been used. Major intersections Image gallery See also References Footnotes Works cited External links National Park Service: George Washington Memorial Parkway History of the George Washington Memorial Parkway The National Parks: Index 2001-2003. Washington: US Department of the Interior All-American Roads United States federal parkways Transportation in Fairfax County, Virginia Transportation in Alexandria, Virginia Transportation in Arlington County, Virginia Roads on the National Register of Historic Places in Washington, D.C. Roads on the National Register of Historic Places in Maryland Roads on the National Register of Historic Places in Virginia National Park Service areas in Maryland National Park Service areas in Virginia National Park Service areas in Washington, D.C. National Register of Historic Places in Fairfax County, Virginia National Register of Historic Places in Alexandria, Virginia National Register of Historic Places in Arlington County, Virginia Historic districts in Arlington County, Virginia 1930 establishments in Virginia Historic American Engineering Record in