Boston CityPASS booklets contain four tickets:
1) New England Aquarium general admission;
2) Museum of Science general exhibit halls admission;
3) Skywalk Observatory general admission;
4) An Option Ticket, with choice of either Museum of Fine Arts, Boston, general admission OR a Historic Sightseeing Cruise with Boston Harbor Cruises.
Save 43% or more on admission to the top attractions in Boston.
Learn more at http://www.citypass.com/boston/.