Topography
New York City is located on the coast of the Northeastern United States at the mouth of the Hudson River in southeastern New York state. The city's geography is characterized by its coastal position at the meeting of the Hudson River and the Atlantic Ocean in a naturally sheltered harbor. This position helped the city grow in significance as a trading city. Much of New York is built on the three islands of Manhattan, Staten Island, and western Long Island, making land scarce and driving the city's high population density. Environmental issues are chiefly concerned with managing this density, which is also a factor in making New York among the most energy efficient and least automobile-dependent cities in the United States.
The Hudson River flows from the Hudson Valley into New York Bay, becoming a tidal estuary that separates the city from New Jersey. The East River, actually a tidal strait, flows from Long Island Sound and separates the Bronx and Manhattan from Long Island. The Harlem River, another tidal strait between the East and Hudson Rivers, separates Manhattan from the Bronx.
The city's land has been altered considerably by human intervention, with substantial land reclamation along the waterfronts since Dutch colonial times. Reclamation is most notable in Lower Manhattan with modern developments like Battery Park City. Much of the natural variations in topography have been evened out, particularly in Manhattan.
The city's total land area is 303 square miles (785.5 km²). The highest point in the city is Todt Hill on Staten Island, which at 409.8 feet (124.9 m) above sea level is the highest point on the Eastern Seaboard south of Maine. The summit of the ridge is largely covered in woodlands as part of the Staten Island Greenbelt.
(Source: Wikipedia.org)
