Nearby attractions include the Steven F. Udvar-Hazy Center of the National Air and Space Museum ( which houses the Enola Gay B-29 Superfortress , a Concorde supersonic passenger airplane , an SR-71A Blackbird plane and the Space Shuttle Discovery ) , Frying Pan Farm Park , Sully Plantation , Reston Town Center , Mount Vernon , Wolf Trap National Park for the Performing Arts , Colvin Run Mill , Aldie Mill , Oatlands Plantation , Manassas National Battlefield Park and the Washington and Old Dominion Trail ( which runs through the town ) .