TIL that the Longyou Caves, a mysterious network of man-made caves over 2,000 years old, were never recorded in any historical documents and were only rediscovered by local farmers in 1992.
TIL that the Longyou Caves, a mysterious network of man-made caves over 2,000 years old, were never recorded in any historical documents and were only rediscovered by local farmers in 1992.
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