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Photographer's Note

The Paglia and Tiber rivers have spent eons washing away most of the volcanic layer of porous tufa that once covered the area around Orvieto. But they left a plug of it jutting some 315m above the plain, and its sheer walls are so defensible humans have been scurrying about atop it for thousands of years.

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Additional Photos by Tiffany Liu (Oceania) Gold Star Critiquer/Gold Note Writer [C: 309 W: 0 N: 561] (4488)
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