ナショナルジオグラフィックのインスタグラム(natgeo) - 12月7日 08時04分

Photo by @Michael Yamashita | The Han-era Great Wall runs straight as an arrow on the valley floor near the walled village of Xiakou. The Han Wall is the longest version of the Great Wall, with a length of over 10,000 kilometers, stretching from North Korea in the east to Xinjiang Province in far western China. It was built of pounded earth and stood no more than 10 meters high. This eroded section of the wall that stands in the Hexi Corridor was mostly built by 121 BC, and helped to protect the Northern Silk Road from the Xiongnu, the Mongol Empire of the time. #greatwall #handynasty #hexicorridor #silkroad

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