v t e Man-made and man-related Subterranea
Natural features	Cave Cenote Grotto Sinkhole
Civilian features	Basement Burial vault (tomb) Borehole Catacombs Dungeon Dugout (shelter) Dry well Earth shelter Erdstall Fogou Hypogeum Manhole Rapid transit Rock-cut tomb Root cellar Tunnel Utility vault Underground city Well Wine cave Secret passage Semi-basement Stepwell Storm cellar Smuggling tunnel Ventilation shaft
Military features	Air raid shelter Bunker Blast shelter Casemate Fallout shelter Missile launch facility (silo) Scallywag bunker Underground base Underground hangar Spider hole
Mining, quarrying, and underground construction	Rock-cut architecture Subsurface utility engineering Tunnel construction Underground mine ventilation Underground mining (hard rock) Underground mining (soft rock)
Related topics	Cave dweller Caves of Maastricht Civil defense Coober Pedy Houston tunnel system Kőbánya cellar system Tunnel warfare Tunnel network Trench warfare Underground living Underground City (Beijing) Underground City, Montreal Mine exploration Mines of Paris Mole people Naples underground geothermal zone Sapping Subterranean London Subterranean Toledo Subterranean warfare Subterranean fiction
Earth shelters US	Bill Gates' house Forestiere Underground Gardens Underground House Colorado Underground House Las Vegas Underground World Home
Earth shelters UK	Underhill, Holme Hockerton Housing Project Malator
Earth shelters Australia	Coober Pedy Lightning Ridge

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