Note: Many of these Capitol Hill buildings are working office buildings. Availability and hours are subject to change, due to special events or other considerations.
Capitol Visitor Center:
Open to visitors from 8:30 a.m. - 4:30 p.m., Monday - Saturday except for Thanksgiving Day, Christmas Day, New Year's Day and Inauguration Day.
Tours of the U.S. Capitol are conducted from 8:50 a.m. to 3:20 p.m., Monday - Saturday.
Visitors with official business appointments may enter the Visitor Center as early as 7:15 a.m.
Visit www.visitthecapitol.gov  for more information about the U.S. Capitol Visitor Center.
U.S. Botanic Garden:
Conservatory: open 10 a.m - 5 p.m. daily, including all weekends and holidays.
National Garden: open 10 a.m - 5 p.m. daily, including all weekends and holidays.
Bartholdi Park: open dawn to dusk, daily, including all weekends and holidays.
Visit www.usbg.gov  for more information about visithing the U.S. Botanic Garden.
Congressional Office Buildings:
The Senate Office Buildings (Russell, Dirksen, Hart) are open to the public Monday-Friday, 7 a.m. to 8 p.m.
The House Office Buildings (Cannon, Longworth, Rayburn, Ford) are open 7 a.m. to 7 p.m.
Library of Congress:
All buildings are closed to the public on Sundays, Thanksgiving Day, Christmas Day and New Year's Day. The Madison and Adams buildings are closed all other federal holidays.
Thomas Jefferson Building:
Monday – Saturday
8:30 a.m. - 4:30 p.m.
James Madison Memorial Madison Building:
Monday – Friday
8:30 a.m. - 9:30 p.m. (Entry after 6 p.m. is reserved for researchers, staff, and those attending special programs.)
8:30 a.m. - 5 p.m.
John Adams Building:
Monday, Wednesday, Thursday; 8:30 a.m. - 9:30 p.m. (Entry after 6 p.m. is reserved for researchers, staff, and those attending special programs.)
Tuesday, Friday, Saturday
8:30 a.m. - 5 p.m.
Visit www.loc.gov/visit/  for more information on visiting the Library of Congress.
Monday – Friday (except Federal Holidays)
9 a.m. – 4:30 p.m.
Visit www.supremecourt.gov/visiting  for more information on visiting the Supreme Court of the United States.