Features Grand Canyon Caverns
the grand canyon caverns largest dry caverns in united states , may largest dry cavern system on earth. @ constant 57 °f (14 °c) 2 percent humidity year round, caverns ideal preservation area.
the area includes hotel, (the grand canyon caverns inn), rv park, campgrounds, restaurant, convenience store, , 5,100-foot (1,600 m) runway.
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