The Longyou Caves are an incredible archaeological site located in the Zhejiang province of China. Discovered in 1992, the caves are believed to have been carved out of the soft rock of the region over 2000 years ago. The caves have revealed a
From Wikipedia
The Longyou Caves, also called the Xiaonanhai Stone Chambers, are a group of 24 artificial sandstone caverns located at Fenghuang Hill, near the village of Shiyan Beicun on the Qu River in Longyou County, Quzhou City, Zhejiang Province, China. It is unknown when the caves were created; they are mentioned in a 17th-century poem by the Yu Xun, and clay from pots dated to between 206BC and 23 AD were found in silt within the caves.