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Published July 19, 2012, 12:00 AM

“Grand Canyon Illusion”

An young female visitor examines the sidewalk artwork “Grand Canyon Illusion” by artist Kurt Wenner outside the National Geographic Visitor Center at the South Rim of the Grand Canyon near Tusayan, Ariz., on June 15. The 3-D piece gives the illusion of being perched atop spires and starting down a winding trail that seemingly plunges into the depths of the massive gorge.

Photos by Joel Kramer / National Geographic Visitor Center at Grand Canyon

Read the article: Art of illusion