Honnold is familiar with the challenges of free-soloing, having climbed Yosemite’s 3,000-foot El Capitan among other feats — but ascending a skyscraper came with its own unknowns.

Skyscraper Live is an event that will feature rock climber Alex Honnold climbing the Taipei 101 skyscraper, one of the tallest buildings in the world, without a harness. Honnold is best known as the star of "Free Solo," a documentary that focused on his attempt to climb the El Capitan rock formation in Yosemite National Park without a harness.

Netflix's "Skycraper Live" went off without a hitch, as professional rock climber Alex Honnold successfully climbed one of the tallest buildings in the world without ropes or a safety net. He conquered the unprecedented climb in under two hours as a global audience watched with bated breath.