Cathcart Martello Tower
Located on the western tip of Cedar Island, which forms part of St. Lawrence Islands National Park of Canada, this fortification consists of a Martello tower, surrounded by a shallow ditch and, in turn, encompassed by a glacis extending to the shoreline on three sides. The guns of Cathcart Tower covered the eastern approaches to Kingston harbour via the North Channel of the St. Lawrence River. It is clearly visible from the advanced battery at Fort Henry. The tower is not open to the public.