Talking about skyscrapers, the most impressive one is yet to be completed:
One World Trade Center (1WTC)
Also known as Freedom Tower, this 541m building will occupy the location where the original 526m World Trade Center twin towers once stood. It will become the tallest building in the United States and is expected to be completed by 2014. With more than 3,000 workers being employed daily on site, much progress has already been achieved since 2006.