More: Learn how to survive a plummeting elevator. We live in a vertical world. Despite suburban sprawl, most of Earth's population is packed into cities that have nowhere to go but up. With ...
Alex Honnold finished the highest "free solo" climb of an urban structure in history, scaling Taipei 101's 1,667 feet in just over 90 minutes.
Some facts to know about Taipei 101 and where it ranks among the world's tallest skyscrapers as Alex Honnold tries to climb it.
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