Great Gull Island, east of Plum Island off the North Fork of Long Island, NY. Check out the large gun emplacements, a 16" was at the structure in the east end. Not far from here to the east is a wonderful lighthouse Little Gull Island, then Fishers Island a part of Suffolk County just off Connecticut, which also had a fort on it at the west end of the island. A mallard duck family its related has taken up residence in the water at the bottom of the former 16" gun's emplacement.