The skyscraper has the highest observatory in the Western Hemisphere

The Hudson Yards Building is being built in New York City, United States, when it completed its 335m high observation deck.

The world's tallest western hemisphere and the fifth- highest observatory have begun to be installed outside the Hudson Yards skyscraper in New York City, the business insider said yesterday. The project is part of the Hudson Yards residential project in Manhattan County, with an estimated cost of $ 25 billion.

Perspective drawing of the 30 Hudson Yards building. (Photo: Business Insider).

Hudson Yards Hudson's residential project. (Photo: Business Insider).

The Hudson Yards residential area of over 113,000 square meters is one of the largest real estate projects in US history. Construction will begin in 2012 and is scheduled to be completed by 2024.

The Hudson Yards Building was designed by Kohn Pedersen Fox Architects. The building has glass and steel structure at 395m high, 60m higher than the observatory, and owns many offices, restaurants, bars, shopping malls and event space inside.

The observation deck was installed outside the building at 335m and 20m wide, with a 347-ton steel frame. The facility is scheduled to open to visitors by the end of 2019, several months after the 30 Hudson Yards opened.