One World Trade Center, the world's most expensive skyscraper

Regarded as the world's most expensive tower, the skyscraper One World Trade Center is already under construction at Ground Zero in New York.

The cost of this complex is an impressive $ 3.8 billion, according to the WSJ, this figure exceeds $ 700 million the previous estimates, thus making it considered, as already mentioned, the most expensive office tower in the world.

Moreover, once built, the One World Trade Center will be the tallest skyscraper in New York, though not the highest ever, as the Burj Dubai's Khalifa far exceeds its quota.

The cost of this tower, as revealed, is thrown because of the adopted strict security systems, also because the One World Trade Center will replace the Twin Towers.