One of the most historic light stations in the United States is located on a 50 acre rocky island off the coast of Cape Ann, Massachusetts. Ships had fished and traded in the waters off Gloucester and Rockport since the early 1600’s and the area’s economy was tied to the sea. Early on, shipping interests realized the importance of lighting the shore and aiding area navigation. This led to the establishment of the twin lighthouses built upon Thacher Island which have guided ships for over 200 years.