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.