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Resolution: 1/2 - Click the region of interest for enlargement.

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Ruin at Yumen Pass, west of Dunhuang in today's Gansu Province of China. Author: 张骐. Date: 2011. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.