via Reddit

When the final part of the spire was lifted and installed on to the top of One World Trade Center, the Port Authority attached a camera to the bottom. This means that with one click, you can get a view from the tallest point in New York City... looking straight down to the street below. Listen, we talk about vertigo a lot here, but this time we're really serious—this is nine minutes of footage that will make your feet sweat like never before. Hold on to your desk chairs: