One World Trade Center, the giant monolith being built to replace the twin towers destroyed in the Sept. 11 attacks, will lay claim to the title of New York City's tallest skyscraper on Monday.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

Workers are still adding floors to the so-called "Freedom Tower" and it isn't expected to reach its full height for at least another year, at which point it is likely to be declared the tallest building in the U.S., and third tallest in the world.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

Space shuttle Enterprise, mounted atop a 747 shuttle carrier aircraft, flies past One World Trade Center prior to landing at John F. Kennedy International Airport on April 27.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

Workers will erect steel columns that will make its unfinished skeleton a little over 1,250 feet high, just enough to peak over the roof of the observation deck on the Empire State Building.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images

One World Trade Center, the central skyscraper at Ground Zero, stands under construction.

Getty Images