12 Archaeological Finds You Wont Believe Were Found On Earth

12 Archaeological Finds You Wont Believe Were Found On Earth

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10. The Longyou Grottoes.

These large artificial caves found in China are carved from siltstone and their origins are still a mystery. They are thought to date to a period before the Qin Dynasty in 212 BCE; however, there is no sign of them in any of the history.

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