Fort Banks - Credit: Wikimedia Commons
Fort Banks was a U.S. Coast Artillery fort located in Winthrop, Massachusetts. It served to defend Boston Harbor from enemy attack from the sea and was built in the 1809 during what is known as the Endicott period, a time in which the coast defenses of the United States were seriously expanded and upgraded with new technology.Other Coast Artillery forts defending Boston that were built or modernized during this period include Fort Warren on George's Island, Fort Andrews on Peddocks Island, Fort Strong on Long Island, Fort Dawes on Deer Island, and Fort Ruckman in Nahant. Today, the fort's mortar battery is on the National Register of Historic Places. Read more on Wikipedia
Source: en.wikipedia.org