Last Updated: 16th Mar 2011
The trolley tour of Boston, offered as an optional, is the best way to see the entire city. Take it at your own pace, but I would suggest stopping off at the USS Constitution and Fenway.
MOMA is well worth a visit, and if you're short on cash, has free entry between 4pm-8pm on Friday nights. It does get very crowded though...
Definitely worth doing if you are in any way interested in Ancient Rome - the guide is a wealth of knowledge.