Ronald Reagan Washington National Airport (DCA), in southern Arlington, is one of the most conveniently situated major airports in the United States — a direct Metro connection on the Blue and Yellow lines puts the centre of DC twenty minutes away. The proximity to the capital creates a unique sight at Gravelly Point, the small park just north of the runway perimeter, where aircraft land and take off directly overhead at low altitude.
The 1941 Terminal A building is a rare intact Art Deco airport structure, with a semicircular plan and original detailing. Even if departing from the newer terminals, it's worth walking over to see.