Governors Island National Monument
Battery Maritime Building, Slip 7
10 South Street
New York, NY 10004-1900

Phone: 212-825-3045

Governors Island is located one-half mile off the southern tip of Manhattan, between the confluence of the Hudson and East Rivers. The National Monument is within a National Historic Landmark District and includes two early-19th-century fortifications--Fort Jay and Castle Williams--which played strategic roles in defending New York City and were key parts of a larger harbor defensive system. Site is currently OPEN TO THE PUBLIC SEASONALLY.