Mammoth Cave 猛犸洞

in travel •  6 years ago 

猛犸洞国家公园位于美国肯塔基州，洞穴纵横交错，总长度达400英里，但是开放的区域并不是很多。

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猛犸洞的一个入口

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6 years ago by

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      ·  6 years ago 

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