N.W. National Museum of Natural History-10th Street and Constitution Avenue. N.W. National Postal Museum-City Post Office Building, Massachusetts Ave. Tours are by reservation only. Limited Congressional tours available with 6 to 8 weeks advance notice. Tours are 90 minutes in length.
Admission is free.
Reservations are required. The Capitol is located at the eastern end of the mall and flanked by the House and Senate office buildings, easy access to the Capitol is provided through both the Union Station and Capitol South Metro Stations. Closed Christmas, New Year's Day, and Thanksgiving. Visit Congressman Burton's office for passes to the House of Representatives and Senate galleries. Children must be at least six years of age to be admitted in the Senate Gallery.