A reproduction the plans for Duxbury Pier Light, AKA bug light the iconic and much loved lighthouse at the Entrance in Duxbury Bay, near Plymouth Harbor, Massachusetts. First Lit on September 15th, 1871, the original structure looks quite a bit different than it does today. The catwalk around the top of the lighthouse was not part of the initial design, but added later in 1897. Made of cast iron, bug light stands 35 feet above high tide.