Thirty-four islands accessible from Boston Harbor comprise this National Park Area! HOW CAN YOU GO WRONG!!!? At the Boston Harbor Islands you can camp, kayak, picnic, swim, bird watch or explore historic trails and forts! This is pretty much an entire weekend trip, but if you are calling it a quick one then you may want to prepare and get a good night sleep the day before your trip!
There are panoramic views of the harbor and Boston, camping available on four islands, and a ferry service provided by Harbor Express (here is their phone number 617-223-8666).
Word of advice: The Summer Shack manages the food concessions on Spectacle and Georges Islands and they are - to describe in one word - TASTY! :)
Address:
One Long Wharf
Boston, MA 02110
Phone #1: (617) 223-8666