Faneuil Hall: daily 9 a.m. - 5 p.m.
Bunker Hill Monument + Battle of Bunker Hill Museum: daily 9 a.m. - 5 p.m. + summer (Jul - Aug) until 6 p.m.
USS Constitution: Nov 1 - Mar 31: Thu - Sun: 10 a.m. - 4 p.m. / Apr 1 - Oct 31: Tue - Sun: 9 a.m. - 6 p.m.
Most other historic sites: 9:30 a.m. - 5 p.m. peak season and 10 a.m. - 4 p.m. off season.
Closed on Thanksgiving, Dec 25, and Jan 1.
Free entrance at the federally owned sites (including the Bunker Hill Monument, Bunker Hill Museum, U.S.S. Constitution, and Dorchester Heights Monument) and free ranger-led programs on the Freedom Trail and at Faneuil Hall.