At a height of 1,776 feet, One World Trade Center will be the tallest building in the Western Hemisphere once it is completed.

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The observation deck on the 100th floor of the building, set ot be one of the biggest tourist attractions, was opened to the media on 2 April.

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The deck which will be opened to the public in 2015, will offer breathtaking views views of New York city.

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Construction on the iconic facility will begin in early 2014. One World Observatory will provide millions of visitors with the ultimate observatory deck experience on floors 100 to 102. 

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The observation deck also will include a multitude of dining options, an opportunity to acquire One World memorabilia, and a premier event space.

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The new World Trade Center building pokes its head above the clouds over New York in this aerial photo taken by photographer Eric Reichbaum from an airplane leaving Laguardia Airport. 

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Children ride down a hill on a toboggan as the skyline of New York's Lower Manhattan and One World Trade Center is seen in Jersey City, New Jersey. 

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Cranes tower over the World Trade Center site in New York's lower Manhattan. 

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The moon rises behind the skyline of New York's Lower Manhattan and One World Trade Center as people stand along the Hudson River in Jersey City, New Jersey. 

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One World Trade Center stands tall on the skyline of New York's Lower Manhattan as a man takes a picture from a pier in Hoboken, New Jersey. 

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The One World Trade Center building is seen above the skyline of Manhattan in New York.

The One World Trade Center is seen from Battery Park in New York. 

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Iron workers walk around the steel decking on the 100th story of One World Trade Center in New York.

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An iron worker walks on a walkway that hangs on the outside of the 100th story of One World Trade Center in New York.

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Iron worker Billy Geoghan climbs a column to help manoeuvre a beam on the 100th story of One World Trade Center in New York. 

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Members of the U.S. Navy Blue Angels fly over the World Trade Center in lower Manhattan as part of the 25th annual Fleet Week celebration in New York. 

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A view shows the One World Trade Center in New York,

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A view shows the One World Trade Center (L) in New York April 30, 2012. 

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A view shows the One World Trade Center in New York. 

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The One World Trade Center and Manhattan skyline is reflected in stone outside the Exchange Place in New Jersey.

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People walk along the Hudson River as One World Trade Center is lit up with red, white and blue lights next to the "Tribute in Lights" behind it during ceremonies marking the 10th anniversary of the 9/11 attacks on the World Trade Center, in New York

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A U.S. flag flutters over the top of the skyline of New York's Lower Manhattan as seen from Bayonne, New Jersey.

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A New York City police officer stands outside the World Trade Center construction site in New York. 

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A construction worker sits atop the edge of a building under construction at the World Trade Center site in New York.

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The under-construction One World Trade Center stands tall on New York's skyline next to the Statue of Liberty and Empire State Building, as seen from Bayonne, New Jersey.

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A general view shows the One World Trade Center tower as work continues on the National September 11 Memorial and Museum at the World Trade Center site in New York.

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A construction worker walks past falling sparks from a worker's torch inside One World Trade Center tower as construction continues on the building and at the World Trade Center site.

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Construction workers install windows on the 29th floor of One World Trade Center tower while construction continues on the building and at the World Trade Center site.

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The World Trade Center construction site is seen after a large column fell 40 stories from Tower four after a cable snapped on a crane, crushing a vehicle on the ground in New York.