45. Huashan Mysterious Grottoes, China
These artificial caves or grottoes are assumed to be chiseled 1,700 years ago in Huashan, China. Until this day, the reason behind building it is still unknown.
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45. Huashan Mysterious Grottoes, China
These artificial caves or grottoes are assumed to be chiseled 1,700 years ago in Huashan, China. Until this day, the reason behind building it is still unknown.