Classes

Countries:

United Kingdom:

deep single-vault station - casemate - cavern - cave system - cave with prehistoric art - cellarium - chandrashala - cluzeaux - crawl space - deep column station - deep geological repository - burial vault - diatreme - dugout - dungeon - erdstall tunnel - favissa - ghost station - grotto - grotto - hypogeum - infernotto - water drainage gallery - underground bicycle parking - underground irrigation canal - underground limestone mine - underground mine - underground parking facility - underground structure - undersea tunnel - underwater tunnel - utility tunnel - ventilation adit - lava tube - water tunnel - wine room - zinc mine - aljibe - artificial cave - basement - beer cellar - burdei - burial cave - underground railway station - subbasement - subterranean river - subterranean waterfall - subterranea - sump - undercroft - underground base - underground city - underground home - underground lake - storm cellar - underground station - underground storage - volcanic pipe - wine cave - yagura - zemlyanka - underground metro station - Sacred Heart cave - Zindan - shallow single-vault station - rock-cut architecture - lunar lava tube - missile launch facility - pit-house - Prince Charlies cave - pylon station - ratskeller - replica of a cave - rock cellar house - rock cellar - rock-cut architecture in India - tunnel of aggression - rock temple - salt cavern - sea cave - sepulchral chapel - shallow column station - shell grotto - sod house - solutional cave - sommerkeller - gravel pit - deep underground mine - denehole - district heating tunnel - drainage tunnel - engine-shaft - flint mine - fogou - gate gallery - geothermal well - gold mine - deep borehole disposal - hauling shaft - haul road - high-speed railway tunnel - hydro mine - immersed tube - international tunnel - inverted siphon - iron mine - lateral drift - limestone quarry - burraia - adega - adit - adit - ancient stone quarry - approach adit - bell pit - blast-hole - blind shaft - borehole - buried watercourse - main adit level - cable tunnel - canal tunnel - catacombs - cavern - chalk quarry - chultun - clay pit - cobalt mine - cycling tunnel - subway tunnel - schotterwerk - shurf - silver mine - slate mine - slate quarry - slope mining - sough - souterrain - spiral tunnel - stone quarry - root cellar - supply tunnel - surface mine - surface shaft - test gallery - tin mine - tramway tunnel - traveling shaft - trum - tunnel network - ort - main drift - manganese mine - manriding shaft - matamorra - mine opening - mine shaft - natural stone quarry - nickel mine - opencast mine - ore mine - active wine cellar - outfall sewer - pedestrian tunnel - penstock - pilot shaft - proposed tunnel - prosek - refilling of shafts - road - rock engineering