Castle Williams, Historic fort in the United States of America
Castle Williams is a circular fortress located on Governors Island in Manhattan, New York.
Constructed in 1807, it served as an integral part of the harbor's coastal defense system.
The fort has withstood the test of time and is a testament to early American military architecture.
It is now accessible to the public and provides educational tours highlighting its history.
Castle Williams is listed on the National Register of Historic Places and is a New York City Landmark.
Location: Manhattan
Inception: 1807
Source: Wikimedia