10 Geological Wonders you don't know A red-rock stunner on the border of Arizona and Utah, The Wave is made of sand dunes that have turned to rock. This little-known formation is accessible only on foot via a three-mile hike and highly regulated.
Ring of Fire - Horseshoe Bend Williams Arizona USA. Photo By Clinton Melander.Horseshoe Bend is actually north of the Grand Canyon near Glen Canyon Dam. This picture is a time exposure showing the progression of a solar eclipse.