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Grand Falls Arizona
Off the beaten trail not far from Flagstaff, Ariz., is an amazing spectacle known as the Chocolate Falls. Only in the spring, and only in years when there's a good snowpack and a good runoff, the Little Colorado river brings a sediment-laden fury of water to Arizona's Grand Falls, and a dry landscape is transformed into one of Earth's most incredible sights.
Above, the Little Colorado River is a major tributary of the Colorado River that usually runs dry in northern Arizona except during the springtime snow melt.