The Old Post Office Pavilion
Pay a visit to the U.S. Bells of Congress and the awe-inspiring, 315-foot Clock Tower. National Park Service Rangers give free tours every day.
Mar. 28-Labor Day: Mon.-Sat., 10 a.m.-8 p.m., Sun., noon-7 p.m. After Labor Day-Mar. 27: Mon.-Sat., 10 a.m.-7 p.m.; Sun., noon-6 p.m.;