FILE - In this May 28, 2013, file photo, a hiker walks on a rock formation known as The Wave in the Vermilion Cliffs National Monument in Arizona. Demand keeps rising for the 20 daily permits given out to be able to hike a geological gem on the Arizona-Utah border called The Wave that features mesmerizing swirls of searing reds, oranges and yellow in bowl-shaped rock formations. More than 160,000 people applied for the 7,300 yearly permits last year, up from 87,000 in 2013, The Salt Lake Tribune reports. (AP Photo/Brian Witte, File)
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