New York City, the most populous city in the United States, is home to 6,125 completed high-rises, 109 of which are 600 feet (183 m) or taller. The tallest building in New York is One World Trade Center, which rises 1,776 feet (541 m). The 104-story skyscraper also stands as the tallest building in the United States, the tallest building in the Western Hemisphere, and the sixth-tallest building in the world. The second tallest building in the city is 432 Park Avenue, standing at 1,396 feet (426 m), and the third tallest is the 102-story Empire State Building in Midtown Manhattan, which was finished in 1931 and rises to 1,250 feet (381 m), increased to 1,454 feet (443 m) by its antenna.
Santiago Calatrava designed the World Trade Center Transportation Hub (its main asset being the PATH station) to replace the old World Trade Center station. The Transport Hub will connect the PATH station and 1 New York City Transit Authority subway train to the ferry terminal, the World Financial Center and One World Trade Center on the west and the 2 3 4 5 A C J Z N R New York City Transit Authority subway trains through the Fulton Center on the East. One will be able to walk most of the way across lower Manhattan. The Port Authority will cool the new station, as well as the September 11 Memorial and Museum, via a heat exchanger fed by four pipes carrying water from the Hudson River. The cost for the transportation hub is estimated at $3.44 billion
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