$10-$25 -- D.C.: Open-Top Sightseeing Tours, up to 50% Off

(Photo from Travelzoo.com) Save up to 50% on Open Top Sightseeing tours of some iconic landmarks in Washington, D.C. and tours include stops at the Lincoln Memorial, the White House, the Smithsonian and more. Choose from the following tours: • For $10 (regularly $20), take an hourlong Twilight Tour of the city's highlights. • For $22.50 (regularly $35), take your time exploring the city with a hop-on, hop-off bus tour Tuesdays through Thursdays. These 24-hour tours include a 50-minute cruise of the Potomac River and depart daily between 9 a.m. and 6 p.m. • Or, for $25 (regularly $40), explore the sights over a 48-hour period Fridays through Mondays. These hop-on, hop-off tours also include a cruise of the Potomac. This offer is valid for tours through Nov. 3, 2011. Go here for more information