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Subterranea (geography)
From Wikipedia, the free encyclopedia
For other uses, see Subterranea.
Subterranea are underground structures, both natural (such as caves) and human-made (such as mines).[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Chamois_P1010758mod.jpg/640px-Chamois_P1010758mod.jpg)
Some subterranea and related topics include:
Subterranea are underground structures, both natural (such as caves) and human-made (such as mines).[1]
Some subterranea and related topics include: