The hop-on hop-off nature of this bus tours allows you all the customization you need to see Boston's best old sites at your pace. What's more, if you find a tour guide you love (like JC, whose witty banter and awesome dad jokes kept us rolling in laughter), you can just stay on and go around and around. If you get the one who only talks about the movies he's helped make, you can easily hop off and get on the next bus. Not knowing anything about Boston, we discovered that once round the circuit helped us learn the streets and feel confident in walking to other places we wanted to see.