American rock climber Alex Honnold summited the Taipei 101 skyscraper — with no ropes or safety net — in an event broadcast live. • New heights: The 1,667-foot Taipei 101 is one of the tallest ...

I kind of lost track of space and time,” the American told NBC News' "TODAY" after he climbed the famous skyscraper.

Alex Honnold, who climbed a 1,667-foot-tall skyscraper in Taiwan on Sunday, is one of a dozen or so known skyscraper climbers ...