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
Swan River (New York) Swan River (New York) The Swan River flows into Swan Lake from the north, and then south out of the lake into the mouth of Patchogue Bay, Long Island, New York, which then becomes the Great South Bay. Originally, the headwaters reached as far north as Medford, New York, near the vicinity of Medford Station. Swan River is a relatively clean, cold, free flowing, freshwater stream, generally less than 15 feet wide, with a sandy substrate. This segment of the river flows through much undeveloped forested wetland, but has also been encroached upon by residential development, road construction, and a