The three museums on Columbia Point are offering a free trolley bus ride from the Back Bay to Columbia Point on Saturdays and Sundays through Nov. 1.
Copley Square times: 9 a.m., 10 a.m., 11 a.m., 12 p.m., 2 p.m., 3 p.m.
Columbia Point times: 9:30 a.m., 10:30 a.m., 11:30 a.m., 1:30 p.m., 2:30 p.m., 3:30 p.m., 4:30 p.m.