If you've already explored the city's major landmarks, consider a day trip to Mount Vernon, George Washington's 8,000-acre plantation. You can reach Mount Vernon by car or via the metro. If you opt to take the metro, take the Yellow Line to Huntington station where you can catch the Fairfax Connector bus No. 101 to the Mount Vernon entrance. You can also take a cruise along the Potomac River (operated by the Potomac Riverboat Company) for views of the estate from the water.