We had lunch by the water and then jumped on a hop on/hop off trolley tour of Boston. The city was so clean compared to New York City and a lot less rushed. We passed beautiful buildings and perfectly manicured parks as well as the site where the Declaration Of Independence was signed.
I'd done a bit of Googling and found this breathtaking gallery that I knew I had to make time for. The Isabella Stewart Gardner Museum was really special because it was all hand picked by it's namesake, so you were given a bit of an insight into what she would've been like in the 1800s.
That night we all went out for dinner and bonded with the newbies that had joined the tour. We wandered around the city and had an earlyish night ready for Canada the next day.