Boston CityPASS, savvy travelers can immerse themselves in Beantown’s best attractions for a surprisingly attractive price. One easy CityPASS purchase secures admission — at 49 percent off the combined ticket prices — to five of Boston’s top sights, including RevolutionaryBoston at the Old State House, a new addition to the 2012 program.

Along with RevolutionaryBoston at the Old State House, Boston CityPASS also includes prepaid tickets to New England Aquarium; Museum of Science; Skywalk Observatory at the Prudential Center; Museum of Fine Arts, Boston; and Harvard Museum of Natural History, which may be visited in place of the Old State House. Boston CityPASS can be purchased online or at any of the participating attractions. It is valid for nine consecutive days, beginning with the first day of use.

The Old State House, located on Boston’s Freedom Trail, was the epicenter of civic life in 18th-century Boston. As such, the Old State House was the scene of some of the most dramatic events leading up to the American Revolution. Just outside the building, the Boston Massacre occurred on March 5, 1770, and, in 1776, America’s Declaration of Independence was proclaimed from its balcony. Today, the restored building houses artifacts and exhibits from the collections of The Bostonian Society.

CityPASS travelers will also enjoy the New England Aquarium’s recently opened Shark and Ray Touch Tank, where visitors can safely touch various species of rays and small sharks; the expansive Art of the Americas wing at the Museum of Fine Arts, Boston; stunning views from Skywalk Observatory; and the Museum of Science’s newly renovated Charles Hayden Planetarium.

And at the Harvard Museum of Natural History, a new exhibition titled Mollusks: Shelled Masters of the Marine Realm runs through February 2014. Included with CityPASS admission, the exhibition explores mollusks’ remarkable diversity and features recent discoveries in their evolutionary history.