Take a cruise through Colonial history while enjoying the modern beauty of Boston’s Inner Harbor and the Charles River on this narrated 90-minute tour from Boston Harbor Cruises. You’ll sail by the Charlestown Navy Yard, where you can see “Old Ironsides,” the USS Constitution, the world’s oldest commissioned naval vessel afloat. Other historical sights include the Old North Church (the location of the “one if by land and two if by sea” signal) and the Bunker Hill Monument (commemorating the famous Revolutionary War battle). As you sail along through the Charles River Locks, you’ll enjoy picturesque views of the Boston and Cambridge skylines, taking in the world’s widest cable-stayed bridge, Esplanade park, M.I.T., Beacon Hill and Back Bay.