Alexandria, VA

ZIP code 22308 occupies part of southeastern Fairfax County along the Potomac River, south of Alexandria. It is largely residential and includes communities such as Hollin Hall, Waynewood, and Riverside Estates. Notable sites include Fort Hunt Park, a former military installation now managed by the National Park Service; River Farm, headquarters of the American Horticultural Society; and Collingwood Library and Museum. The Mount Vernon Trail also runs along the riverfront.