A recent Boston Globe article describes efforts to expand tourism at the islands in Boston Harbor, which have been under the auspices of the National Park Service since 1996. It describes the friction of distance created by the relatively high-cost ferries. Even so, the islands are scenic, historic, and varied enough to provide many opportunities for geographers to explore. They might make a good destination for a GEO excursion in the fall, and certainly a nice outing for any summer day.
Geographers can also learn a lot about the harbor from the Hull Lifesaving Museum, which has recently embarked on an exciting geographic education project.