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This May 28, 2013 photo shows hikers walking on rocky terrain for a 3-mile trip to The Wave rock formation in the Vermilion Cliffs National Monument. People who make the hike are advised to bring at least a gallon of water for the desert backcountry journey that begins in southern Utah and crosses over the border into Arizona. (AP Photo/Brian Witte)

Arizona's iconic sight: The Wave

Only 20 people are allowed to visit The Wave each day, with 10 chosen in an online lottery

four months in advance and the other 10 picked in a daily lottery. The U.S. Bureau of Land Management limits access to protect The

Wave's delicate red sandstone formation and to prevent overcrowding at

the designated wilderness site in the Vermilion Cliffs National Monument in St. George, Arizona.