The Longyou Caves — 2000 years old, tool marks are IDENTICAL throughout 30,000 sqm, zero historical record

This one was discovered in 1992 when a farmer in Zhejiang province, China, pumped water out of a pond he thought was just a pond. Under it was a massive artificial cavern. Then they pumped out the neighboring ponds. Five more caves. Total area: around 30,000 square meters of carved siltstone. The ce……