I went to Boston in February this year for a week, its such a pretty and old city, they do 'trolley tours' around the whole city which you can buy tickets from at certain bus stops, but I just asked at the hotel I was staying in and they set it up for me, you can get on and off the tram when ever you like. Its a guide of all the historical parts, and they give a commentary all the way, which was quite funny! I want to go back, It so nice to visit somewhere were everyone is friendly, polite and have manors!