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Tagslongyou
1 place carries this tag, across every kind and continent it appears in.
🇨🇳 China · Archaeological wonder
Warring States to Han (~300 BCE – 100 CE; debated) · Yue / early Han Chinese
Twenty-four enormous man-made siltstone caverns rediscovered in 1992 after 2,000 years of siltation, each a single chamber 10–30 m high hewn with chisels that left uniform parallel tooling covering…