 Photo taken on July 17, 2006 shows an
entrance to one of the Huashan Mysterious Grottoes in Huangshan city, east
China's Anhui Province. Thirty-six grottoes, two of which are beneath
water surface, have been discovered here, while their history, including
when and why to be built and stone materials used remain
unknown. (Xinhua Photo) | [1] [2] [3] [4] [5] [6]
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