. "Fair"@en . "Yes"@en . . . . . . . . "1807"^^ . . . . . "United States of America"@en . . "Public - National Park Service"@en . . . . "Castle Williams is a circular fortification of red sandstone on the northwest point of Governors Island, part of a system of forts designed and constructed in the early 19th century to protect New York City from naval attack. It is a prominent landmark in New York Harbor. Together with Fort Jay (Fort Columbus), it is managed by the National Park Service as part of Governors Island National Monument."@en . . "Governors Island, New York, New York"@en . . "Sandstone, Granite, Brick"@en . "Circular fort"@en . . "Castle Williams"@en . "-1840.0"^^ . "View from the Staten Island Ferry on New York Harbor"@en . "Castle Williams"@en . "Castle Williams is a circular fortification of red sandstone on the northwest point of Governors Island, part of a system of forts designed and constructed in the early 19th century to protect New York City from naval attack. It is a prominent landmark in New York Harbor. Together with Fort Jay (Fort Columbus), it is managed by the National Park Service as part of Governors Island National Monument."@en . . "40.0"^^ . .