Watch This Amazing Time-Lapse Of One World Trade Center Being Built [VIDEO]

To celebrate the opening of One World Observatory in New York City, the people at EarthCam have just released this breathtaking video.

This incredible video takes us through the very start, right up to the completion of construction from October 2004 to Memorial Day 2015. Over the past 11 years, EarthCam took thousands of high definition images and hand-edited them for this exclusive time-lapse movie.