3. Mill Rock

Other Islands-NYC-North Mill Rock_East River_Untapped CitiesMill Rock

Mill Rock, just south of Wards Island and Randalls Island, was originally two islands called Great Mill Rock and Little Mill Rock. The area was known as Hell Gate for the havoc it wreaked on ships. The islands were connected in 1885 through a massive detonation by the Army Corps of Engineers that was felt all the way in Princeton, New Jersey.