Smithsonian American History Museum — free daily admission

This is free. When: 10 a.m.–5:30 p.m. daily; closed Dec 25. Where: 1300 Constitution Ave NW, Washington, DC.

Smithsonian National Museum of American History · Offer

Official Smithsonian Visit Museums page: Free admission at all Smithsonian museums (except Cooper Hewitt NYC). American History Museum: Free, no passes needed. 10 a.m. to 5:30 p.m. daily. 1300 Constitution Ave. NW, Washington, DC.