Boston is a fabulous city with loads of things to see and do. However, we have visited Boston on two other occasions and did not take any tours. Walking into the city would be a very long walk. We did take a bus (purchased tickets on the dock) into Boston Commons and Fenelia Square. You can stay as long as you like, buses run about every 15 mins., caution the area where you re-board to return to the ship gets very hectic, just have to be patient.