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Easily the most audacious tourist attraction of the year, the Skywalk U-shaped footbridge extends 65 feet beyond the lip of the Grand Canyon, with zero support from below. Set for completion next month, the $30 million balcony consists of two curved, parallel steel beams joined together by a 2.5-inch-thick glass floor, offering a view of the ground nearly three quarters of a mile below. To secure the bridge, 96 steel rods bore 50 feet into the canyon wall just beneath the visitors’ center, and a set of 1.6-ton steel dampers brace the structure against gusts up to 90mph. www.destinationgrandcanyon.com
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