Grand Canyon Skywalk

The Grand Canyon Skywalk is a U-shaped glass bridge over the canyon, 4000 feet above the Colorado River. Daniel Terdiman visited the Skywalk and wrote this story.

I'm still standing thousands of feet in the air, with just some glass separating me from a messy end below. And for some reason, my mind is making me walk very slowly. Walking normally, I find, is nearly impossible.