Taipei 101 — which, in total, reaches a staggering 1,667 feet — was once the tallest building in the world. On Sunday, Honnold climbed it in a nerve-racking 91 minutes. Due to the extreme level of risk, the livestream included a 10-second delay, giving the broadcasting crew just enough time to cut off the recording should plans go awry.

World-renowned free solo climber Alex Honnold has successfully summited Taiwan’s Taipei 101 in just over an hour and thirty minutes, accomplishing his lifelong dream and setting a record for the tallest urban free solo climb in the world.

"See ya up there," Alex Honnold said after hugging his wife and walking to the corner of the building. Then he got started

Alex Honnold climbed Taipei 101, a 1,667-foot tall skyscraper without ropes or a safety net in just 90 minutes.