Boston Duck Tours - http://www.bostonducktours.com - See Boston by land and by sea in an a World War II amphibious landing vehicle. Cruise by all the places that make Boston the birthplace of freedom, and get a water-side view of Boston like you can't get anywhere else.
DEM Roxbury Heritage State Park - http://www.state.ma.us/dem/parks/rxhp.htm - Built in 1750, the Dillaway-Thomas House served as headquarters for General John Thomas and the Continental Army during the siege of Boston in 1775. Interpretive exhibits and scenic overlook of downtown Boston.