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eppur_se_muova

(38,320 posts)
9. Mammoth Cave is a lot like that ...
Sun Dec 3, 2017, 09:25 AM
Dec 2017

stalactites and stalagmites in only a small portion of the cave, where groundwater percolates through from above. The rest of it looks like a long-abandoned subway tunnel. Huge, but not bery scenic.

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