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Coolest New Landmarks Around the World

new landmarks around the world: Grand Canyon Skywalk

National Geographic Image Collection / Alamy

Grand Canyon Skywalk, AZ

Twelve-and-a-half inches of reinforced glass is all that separates the brave souls who walk this four-year-old horseshoe plank from a 4,000-foot plunge into the Colorado River below. —Erin Florio

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