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Photo: Ken Lund from Reno, Nevada, USA, CC BY-SA 2.0 via Wikimedia Commons
George Washington's Mount Vernon Estate and Gardens; has its own article
Mount Vernon is the former residence and plantation of George Washington, an American Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States, and his wife, Martha. An American landmark, the estate lies on the banks of the Potomac River in Fairfax County, Virginia, approximately 15 miles (25 km) south of Washington, D.C.
© OpenStreetMap contributors
Popular with joggers and picnickers, the park holds defensive batteries from the former army installation, the exterior of which can be explored.
A historic mansion that is headquarters of the American Horticultural Society. The grounds are open to the public, and there is a garden shop.
An oasis of wilderness in the middle of suburban sprawl, notable for the amount and variety of wildlife that congregates there. Features a large beaver lake with a boardwalk constructed across it. Popular with bird-watchers.
A 19th-century plantation house
One of the largest remaining pieces of freshwater tidal wetlands left in the DC area, accessible by a short hiking trail