Watch This Two-Minute Time-Lapse Video of One World Trade Center Rising

May 29, 2015 — It's official! The One World Observatory at One World Trade Center opened today to the public. And what a view it is. The observatory is on floors 100, 101 and 102 of what is — for now, anyway — the nation's tallest skyscraper. To mark the big debut, webcam content, technology and services provider EarthCam released a commemorative time-lapse movie showing the completion of construction from October 2004 to Memorial Day 2015. Hundreds of thousands of high definition images were captured throughout the past eleven years and hand-edited for the exclusive time-lapse movie. Click "Read More" to check it out!