Longyou Caves: Mysterious Man-Made Caves Over 2,000 Years Old

The Longyou Caves, also called the Xiaonanhai Stone Chambers, are a group of 24 artificial sandstone caverns located at Fenghuang Hill in Zhejiang province, China. These caves are believed to have been constructed over 2,000 years ago, during the Qin dynasty (around 212 BCE). However, the exact purpose and method of construction of these caves rema...

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