From Simple English Wikipedia, the free encyclopedia

Subterranea refers to underground structures, both natural (such as caves) and man-made (such as mines). Some subterranean features are secret places(see also Category:secret places); most, like road tunnels, subway systems and sewers, are parts of public infrastructure.


This category has the following 2 subcategories, out of 2 total.


Pages in category "Subterranea"

This category contains only the following page.