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
Waini River stretch of intact mangrove forest, brackish water and coastal swamp communities. There are three significant waterfalls along the Waini. The furthest up river is Kasatu Falls at . Waini River The Waini River is a river in the Barima-Waini region of northern Guyana. It flows into the Atlantic Ocean near the border with Venezuela. The upper portion of the river flows through the Guianian moist forests, while the lower Waini river flows through the eastern extent of the vast Orinoco Delta swamp forests before emptying into the sea. Almond Beach at the mouth of the Waini River is one of