Subterranea are underground structures, both natural (such as caves) and human-made (such as mines). Some subterranea and related topics include:
Natural Caves Cenote Ice cave Sea cave Sinkhole Karst Lava tube Lunar and Martian lava tubes Subterranean river Subterranean waterfall Underground lake Volcanic pipe
Human-made or human-related by common function
The following is a list of examples of structures which are or can be underground.
Civil defense Air raid shelter Blast shelter Fallout shelter Storm cellar Cultural heritage Catacombs Dungeon Erdstall Fogou Hypogeum Passage grave Rock-cut architecture Rock-cut tomb Disposal of corpses or religion: Burial vault Crypt Living Basement Cave dwelling Dugout Earth shelter Underground city Maintenance Manhole Utility vault Extractive activities Mine Quarry Military Bunker Casemate Foxhole Missile launch facility Spiderhole Underground base Underground hangar Storage Bank vault Root cellar Wine cave Transport Tunnel Smuggling tunnel Secret passage Underground rapid transit system Water supply, wastewater or drainage Dry well Stepwell Sewerage Well Other or multiple functions Borehole Ventilation shaft
See also Boring (earth) Seattle Underground Subterranean London
References