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The deepest known cave on Earth
Source:
http://redd.it/20souy
actually that's a photo of Miao Keng in China, a 509m shaft
More:
http://www.shonephotography.com/
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| 發表文章 | 發起投票 |
Source:
http://redd.it/20souy
More:
http://www.shonephotography.com/
00