the grand canyon skywalk is a horseshoe-shaped glass walkway, suspended 1,200 meters above the canyon---a height that eclipses the world's largest skyscrapers. the skywalk is anchored deep into a limestone cliff. on march 20th, native american leaders and former astronauts stepped onto the skywalk and looked down to see the 4,000-foot chasm below. quote from hell: "As people walk across it, the glass layers creak and the deck wobbles almost imperceptibly."
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