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A view of the ruins of the ancient city of Jiaohe, seen at sunset in March, 2007 in Turpan, China.
Jiaohe, was built on a 98-foot-high loess plateau over 2,300 years ago, lies in the Yarnaz Valley and is protected by the natural fortification of the precipitous cliffs.
The city has been a major passageway for communication between the East and West since the Han Dynasty and Tang Dynasty, and an important section of the ancient Silk Road.
Image Credit: Photograph by China Photos / Getty.