The harbor town that helped build America's fleet
Everything Marblehead became, it became because of the water at the end of the street. Six stops over 3.5 miles, about 31 minutes of driving. Each one starts talking the moment you reach it, so you can keep your eyes on the street instead of a screen.
Of the two MassRoam tours in Marblehead, this is the maritime one. There is no start time to make — walk it in one go, or leave the rest for another afternoon.