New York City worldwide. New York City is situated in the Northeastern United States, in southeastern New York State, approximately halfway between Washington, D.C. and Boston. The location at the mouth of the Hudson River, which feeds into a naturally sheltered harbor and then into the Atlantic Ocean, has helped the city grow in significance as a trading port. Most of New York City is built on the three islands of Long Island, Manhattan, and Staten Island. The Hudson River flows through the Hudson Valley into New York Bay. Between New York City and Troy, New York, the river is an estuary. The
Chautauqua County, New York County, in the southwestern corner of New York State, along the New York-Pennsylvania border, is the westernmost of New York's counties. Chautauqua Lake is located in the center of the county, and Lake Erie is its northern border. Part of the Eastern Continental Divide runs through Chautauqua County. The area that drains into the Conewango Creek (including Chautauqua Lake) eventually empties into the Gulf of Mexico; the rest of the county's watershed empties into Lake Erie and via Lake Ontario and the St. Lawrence Seaway into the North Atlantic Ocean. This divide, known as the Chautauqua Ridge, can be used