United States Capitol
http://www.visitthecapitol.gov/
For a Capitol tour, you can reserve a tour through the Capitol Visitor Center website or request a staff-led tour through my Washington office. Tours last approximately 1 ½ to 2 hours. Staff-led tours are offered Monday through Friday from 9:30am to 3:30pm. The Capitol Visitor Center is open and offers tours from 9:00am to 2:30pm. To schedule a tour with the Capitol Visitor Center please visit http://www.visitthecapitol.gov/visit/book_a_tour/. Please note that tour schedules fill up quickly so plan accordingly.
Metro stop: Union Station or Capitol South