This is the largest and most expensive real estate project in the US

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Hudson Yards is the largest and most expensive real estate project in the US

The largest private real estate development project in the US is well underway, and many people still don't even know about it.

Called Hudson Yards, the development will take over a massive 17 million square feet consisting of commercial, residential and retail property.

The project blows both the Freedom Tower and Barclay's Center (two of New York's most prominent architectural landmarks in recent years) out of the water size-wise, and is the largest constructional undertaking in the city since the construction of Rockefeller Center in the 1930s.

The 28 acres that the property will live on stretches from Manhattan's Upper West Side to the Midtown West/Hell's Kitchen area.

Oh, and here's another thing—the majority of construction will be built on a highly elevated platform over (still operational) train tracks in order to accommodate for the amount of space needed to complete Hudson Yards.

Take a look at the construction of Hudson Yards as it's been unfolding:

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Hudson Yards construction
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This is the largest and most expensive real estate project in the US

View of the walls around the Hudson Yards construction site, Manhattan, New York, New York, April 26, 2013. The Yards are a 15-structure mini-city built on Manhattan's West Side built on platforms over the John D. Caemmerer West Side Yard and bounded by 30th St., Tenth Ave. 33rd St., and the West Side Highway. 

Photo credit: Getty

A model of the future HudsonYards Project is displayed during the announcement of the winning bid by TishmanSpeyer at the Hudson Rail Yards on March 26, 2008 in New York City. 

Photo credit: Getty

Joseph Moinian, chief executive officer of Moinian Group, stands for a photograph at the company's 3 Hudson Boulevard construction site in New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

Cranes stand at construction sites in the Hudson Yards neighborhood of New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown.

Photo credit: Getty

Joseph Moinian, chief executive officer of Moinian Group, left, and his son Mitchell Moinian, senior vice president of Moinian Group, enter the company's 3 Hudson Boulevard construction site in New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

People walk through Hudson Park in New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

Construction cranes stand in the Hudson Yards neighborhood of New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

Construction cranes stand in the Hudson Yards neighborhood of New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

Pedestrians walk along the High Line as 10 Hudson Yards stands after a topping out ceremony in New York, U.S., on Wednesday, Oct. 7, 2015. The topping out of 10 Hudson Yards, a major milestone for the new neighborhood and New York City, was marked with the raising of the last batch of concrete to the top of the building and a lunchtime celebration with thousands of construction workers.

Photo credit: Getty

A building stands under construction past the silhouette of a construction worker before the start of a topping out ceremony at 10 Hudson Yards in New York, U.S., on Wednesday, Oct. 7, 2015. The topping out of 10 Hudson Yards, a major milestone for the new neighborhood and New York City, was marked with the raising of the last batch of concrete to the top of the building and a lunchtime celebration with thousands of construction workers. 

Photo credit: Getty

A contractor works at 10 Hudson Yards before the start of a topping out ceremony in New York, U.S., on Wednesday, Oct. 7, 2015. The topping out of 10 Hudson Yards, a major milestone for the new neighborhood and New York City, was marked with the raising of the last batch of concrete to the top of the building and a lunchtime celebration with thousands of construction workers. 

Photo credit: Getty

10 Hudson Yards, left, stands under construction in New York, U.S., on Thursday, May 7, 2015. Tenants that have already committed to the new developments on Mahattan's west side include Time Warner Inc. and Coach Inc. 

Photo credit: Getty

A train moves on the West Side Yard underneath construction for the Hudson Yards Redevelopment Project in New York, U.S., on Thursday, May 7, 2015. Tenants that have already committed to the new developments on Mahattan's west side include Time Warner Inc. and Coach Inc. 

Photo credit: Getty

In this March 4, 2016 photo, cranes move loads of materials at dusk at the Hudson Yards construction site in New York. The steel behemoths are sprouting up all over the city, a prime force in New York's building boom capped by a sea of skyscrapers that are changing the famed urban skyline. 

Photo credit: AP

Nighttime view of Hudson Yards construction site, Manhattan, New York, New York, April 17, 2013. The Yards are a 15-structure mini-city built on Manhattan's West Side built on platforms over the John D. Caemmerer West Side Yard and bounded by 30th St., Tenth Ave. 33rd St., and the West Side Highway. 

Photo credit: Getty

Cranes work at Hudson Yards construction site, Monday, Nov. 23, 2015 in New York. 

Photo credit: AP

UNITED STATES - MAY 21: train yards Hudson Yards along the Hudson River on Manhattan's West Side.

Photo credit: Getty

A construction worker climbs on a crane at the Hudson Yards during the opening of the Hudson Yards subway station in New York, U.S., on Sunday, Sept. 13, 2015. The $2.42 billion, 1.5 mile extension of the 7 Line to 34 Street and 11 Avenue is the only train south of 59th Street to provide service west of 9th Avenue, offering access to the Jacob Javits Convention Center, the High Line, and Hudson River Park.

 Photo credit: Getty

Passengers enter the Hudson Yards subway station during it's opening in New York, U.S., on Sunday, Sept. 13, 2015. The $2.42 billion, 1.5 mile extension of the 7 Line to 34 Street and 11 Avenue is the only train south of 59th Street to provide service west of 9th Avenue, offering access to the Jacob Javits Convention Center, the High Line, and Hudson River Park.

Photo credit: Getty

Construction continues on the Hudson Yards project in New York, Wednesday, Dec. 4, 2013. 

Photo credit: AP

Construction continues on the Hudson Yards project in New York, Wednesday, Dec. 4, 2013. 

Photo credit: AP

Hudson Yards and the High Line, foreground, are shown in this, Dec. 1, 2013 aerial photo in New York. The Empire State Building, top left, and midtown Manhattan skyline tower over the railroad yards. 

Photo credit: AP

Construction workers gather to mark the one year anniversary of the Hudson Yards project in New York, Wednesday, Dec. 4, 2013. 

Photo credit: AP

A massive steel I-beam arrives on a flatbed truck for delivery to the Hudson Yards construction site, Friday, May 8, 2015 in New York. The steel pieces are the first shipment of a 100,000-ton steel order that will be used to complete construction of the 14-acre Eastern Rail Yard platform, a skyscraper that will house Time Warner headquarters, and a retail space with a Neiman Marcus store. The platform is being built over 30 active Long Island Rail Road (LIRR) train tracks and three subsurface rail tunnels utilized by AMTRAK and New Jersey Transit. Hudson Yards is expected to consist of 16 skyscrapers, containing new office, residential, and retail space. The tower under construction, center, is 10 Hudson Yards, the future home of Coach, L'Oreal and SAP.

Photo credit: AP

A BG 40 drill rig breaks ground for a new neighborhood called Hudson Yards, Tuesday, Dec. 4, 2012 in New York. The ambitious development is meant to transform the largest undeveloped property in Manhattan from an isolated rail yard into a sleek new neighborhood of spiky high-rises and graceful parks.

Photo credit: AP

This July 26, 2012 photo shows the railing for Hudson Yards in New York. This $15 billion small city within a city will soon start rising on land by the Hudson River. 

Photo credit: AP

A worker walks on an upper floor of a building during construction in the Hudson Yards neighborhood of New York, U.S., on Monday, April 25, 2016. A construction surge is transforming a decaying industrial expanse known as Hudson Yards -- from about 25th to 42nd streets, west of Eighth Avenue and stretching toward the Hudson River -- into a glittering enclave thats expanding the borders of New Yorks office districts and drawing some prestigious firms away from the traditional core of Midtown. 

Photo credit: Getty

10 Hudson Yards stands before the start of a topping out ceremony in New York, U.S., on Wednesday, Oct. 7, 2015. The topping out of 10 Hudson Yards, a major milestone for the new neighborhood and New York City, was marked with the raising of the last batch of concrete to the top of the building and a lunchtime celebration with thousands of construction workers.

Photo credit: Getty

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Jim White, who's overseeing the entire platform portion of the project (which is being developed by privately-held Related Companies), explained:

"The height of the buildings was crucial because half of Hudson Yards is open space. We were able to engineer the platform for the design we wanted for the buildings. Despite the challenges, we weren't restricted in what we could build."

A new subway track opened last fall as a part of the project, which offers stops to some of the area's most sought after locations like The High Line and Hudson River Park.

The plan for the next few years of construction also includes a hotel and public school.

SEE ALSO: A guide to finding rent-stabilized apartments in New York

Construction on Hudson Yards began back in 2011. The second phase of construction is estimated to begin in 2017, with the entire project expected to reach completion by the end of 2020.

And of course such a hefty and lofty venture comes with a hefty and lofty price tag—total construction is estimated to cost over $20B.

Jay Cross, president of Related Hudson Yards, told Yahoo:

"We use just about every kind of financing, just because the volume of dollars is so great that you have to go after every source."

Cross and the rest of Related have high hopes that their project is only the beginning for urban dwellers across the rest of the country:

"[Big cities are] where you get upward mobility. That's where the jobs are that can enhance the quality of life... We hope to pioneer things here in Hudson Yards which we can do on scale and then roll them out in lots of other cities."

We're excited to see the progress of the Hudson Yards as it continues to develop into the second half of this year and beyond.

Take a look at these amazing architectural landmarks in Manhattan:

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New York City sights, landmarks
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This is the largest and most expensive real estate project in the US
New York City downtown and Brooklyn bridge
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A yellow rose stands wedged into the name of Donald Simmons at the South Pool of the National September 11 Memorial, Tuesday, Nov. 11, 2014, in New York. Volunteers placed yellow roses into the names of veterans who died at the World Trade Center on September 11 as part of a five-day Salute to Service in recognition of Veterans Day. (AP Photo/Julie Jacobson)
The Empire State Building in New York City, Manhattan.
New York City, Manhattan, New York, United States, North America
New York City, New York, United States, North America
statue at rockefeller centre, fifth avenue, new york, usa
ABC NEWS - 9/24/15 - Coverage of Pope Francis' visit to New York City to celebrate Mass at St. Patrick's Cathedral which will air on all ABC News programs and platforms. (Photo by Ida Mae Astute/ABC via Getty Images)
Ice skaters having fun in New York Central Park in fall
View of the midtown Manhattan skyline and Central Park in New York City.
View of Citi Field during the Philadelphia Phillies versus the New York Mets baseball game on Monday, May 28, 2012 in New York. (AP Photo/Kathy Kmonicek)
This photo shows an ariel view of Yankee Stadium in the Bronx boro of New York, Friday, June 20, 2014. (AP Photo/Seth Wenig)
An ariel view of the Statue of Liberty in New York Harbor, Friday, June 20, 2014. (AP Photo/Seth Wenig)
The George Washington bridge spans the Hudson River between New Jersey and New York, Friday, June 20, 2014. (AP Photo/Seth Wenig)
People walk by the Museum of Modern Art store, in New York, Tuesday, April 22, 2014. (AP Photo/Richard Drew)
The Metlife building looms above Grand Central Terminal on Friday, July 5, 2013 in New York. It opened in 1963 as the Pan Am Building, then headquarters of Pan American World Airways, before it was sold to Metlife in 1981. Completed in 1913 and celebrating its 100th birthday, Grand Central was hailed as the largest and greatest railway terminal in the world. (AP Photo/Bebeto Matthews)
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