Photo via Talwin on Reddit (view larger image here)

This morning Redditor Talwin posted a photo that made our feet sweat, showing 1WTC (with the complete spire in place) from 4 World Trade Center. We contacted the poster who took the vertigo-inducing photo, and he's an ornamental iron worker for Local Union 580, "part of the crew hanging glass on Tower 4." So it's probably good he isn't afraid of heights—he told us, "I don't get vertigo... I'm abnormally comfortable with heights. I'm always in a harness though, so that's kind of cheating."

Click here and go FULL VERTIGO.