Capitol South or Union Station . See the Constitution, Declaration of Independence, and the Bill of Rights. National Parks Service offers a tour of the bell tower with a splendid view of the city. The lines for this tour are normally much shorter than for the Washington Memorial. Docked near the Navy Museum is a real Vietnam-era destroyer, the USS Barry.
Tours are by reservation only.
Open Monday through Friday. No tours are given during August. This building was built in 1836 and since then has served as the headquarters for the Treasury Department. The tour includes the history of the Treasury Department and the building's architecture history. This includes a tour of the Andrew Johnson suite, where, in 1865, President Johnson conducted official business for 6 weeks after the assassination of Abraham Lincoln.