© Jeff Smallwood
Washington is a river city, and there are plenty of opportunities to enjoy a boat trip. It can be a 20-minute water taxi ride from Alexandria to the National Harbour or a 3-hour sightseeing tour featuring such landmarks as the Washington Monument, the Lincoln Memorial, and Reagan National Airport. If you want to explore the historical river further, you can take a trip to George Washington's estate on Mount Vernon. The sailing and cruising season usually runs from May to November.