The Mount Vernon Trail is located just across the river from Downtown Washington, DC and is a great multi-use recreation trail. The recreational trail is nearly 18 miles long and it follows the Potomac's Virginia shoreline from Theodore Roosevelt Island to George Washington's Estate located at Mount Vernon. The excellent scenery and consistently well-maintained condition of this paved surface makes the Mount Vernon Trail a favorite of cyclists, hikers and runners.
Aside from the White House, the United States Capitol building is the most visited building in Washington. This incredible building with its regal dome and classic architecture symbolizes democracy to everyone who sees it. The view from the front steps is like nothing else, so make sure you have your camera with you. Tours are available at the kiosk on the southwest side of the Capitol, and are free of charge, on a first-come, first-served basis. Plan to get there early, as there are always plenty of people in line for this extremely popular attraction.
The Smithsonian National Museum of Natural History boasts the world's largest natural history collection that will inspire several "oohs' and "aahs" from visitors of all ages. Among the highly dramatic and memorable exhibits are a 70 million-year-old dinosaur egg, an incredible giant squid, and a look at a truly unforgettable tarantula feeding that will inspire several gasps among all who view it. In addition to all of these exhibits, the museum offers even more adventures via the 3-D IMAX theater within its facility.