Governors Island National Monument
Governors Island National Monument - Castle Williams
Castle Williams is a circular defensive work of red sandstone on the west point of Governors Island in New York Harbor. It was designed and erected between 1807 and 1811, designed by the Chief Engineer of the US Army Corps of Engineers, Lt. Col. Jonathan Williams, for whom the fort is named, and considered a prototype for new forms of coastal fortification. The castle was one component of a larger defensive system for the inner harbor. Castle Williams is open to the public on weekends during the 20212 season, and is under the stewardship of the National Park Service.
Please note: self-guided tours only at this time. Rangers will be on hand to answer questions and provide information.