One of the greatest free solo climbers of all time, Alex Honnold, is about to risk everything to scale the Taipei 101 skyscraper — one of the tallest buildings in the world.

U.S. climber Alex Honnold scaled the Taipei 101 skyscraper without ropes or safety netting on Sunday, watched by thousands of cheering and waving fans as he clambered up one of the world's tallest bui...

Without any ropes or harnesses, the 40-year-old completed the daunting 508m ascent in just under an hour and 32 minutes.