Being a history fanatic, this was one of the most enjoyable, but tiring activities I have ever done. We didn't do the guided tour, but opted insted for the audio tour. This was an excellent choice as you had commentary all along the tour, but could take it at your pace. We also noticed with the guided tour that it didn't do as many sights as were listed with the audio guide. The cast was $15.00 per person and well worth it. My favorite stop was the Paul Revere House and the Old North Church.