FREE mini golf now in Boston! Located at the USS Constitution in Charlestown you can play a free round of 9 hole mini golf and check out the National Park for free too! Family friendly or just go with your friends. All the holes are Boston themed and have information on the history so you might learn something new too Check it out this summer season and follow bostonwithemily for more fun, free, and new boston finds! #boston #freeinboston #nationalpark #charlestownma #ussconstitution