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Leaving Arequipa, you quickly hit the desert, which, as you get closer to the coast, becomes the driest desert in the world. This shot is from 10 miles outside the city. At the far edge of the flat area is an archaeological site called El Arenal de Uchumayo, a probable outpost of the Wari Empire, which flourished from about AD 550 to 850. The site shows up as a white spot below the hills in the background. The white patches on the hills themselves are volcanic ash deposits that are still blowing around from a giant eruption of the volcano Huaynaputina (located over 100 miles to the south) in the year 1600.

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