Boston Hop-on Hop-off Trolley Tour with Optional Harbor Cruise. Ride through the streets of Boston and take in the highlights with a convenient and easy hop-on hop-off trolley tour. Discover why this city is called the Cradle of Liberty! Learn about historical events including the Boston Tea Party, Paul Revere’s Ride, the Boston Massacre, and the role Bostonians played in the American Revolution on this fully narrated tour. Book with us and Save 15%! Boston Hop-on Hop-off Trolley Tour.