Sure, if the price is right. Since you'll be in downtown Boston, the easiest thing to do, if you like historic things, is to walk the Freedom Trail. You just follow a red line in the sidewalk and see the Boston Common, Public Garden, State House, Fanieul Hall, historic churches, Boston Massacre Site, Paul Revere's birthplace (?), cemetaries, etc, etc. It's really a perfect city tour you do on your own with very simple navigation.