Start off at the Boston visitors centre, and follow the red brick road throughout historic sites in Boston!
There's options to have a guided tour with staff in historical dress, and the groups that I eavesdropped on seemed to be having a lot of fun with their guides!! But if you're sneaky like me, you can sidle up to another group and have a quick listen in :)
Walking the route will take about 3 hours, and longer if you stop off at the various museums on the way.
A fantastic method to find your way through this beautiful city!!