All pages
- Abbotscliff Tunnel
- Adit
- Beasdale, Railway Tunnel
- Bourne Park Tunnel
- Bowling Tunnel
- Bwlch-Ystyllen Lead Mine
- Camdwr Bach Lead Mine
- Cardiff Regional War Room
- Cave
- Cavern
- Channel Tunnel
- class
- Clayton Tunnel
- Docklands Light Railway tunnel
- Dover Harbour Tunnel
- Expounder
- Fan Bay Deep Shelter
- Fawley Tunnel
- Ferndale Colliery
- Gamallt Lead Mine
- Glyncastle Colliery
- Grotto
- Hendre quarry
- Ice cave
- Jubilee line tunnels
- Kent Mining Museum
- Lady Windsor Colliery
- Lydden Tunnel
- Maeshafn Lead Mine
- Main Page
- Missing
- Nant-y-bwlch, Coal Level Ii
- Nant-y-bwlch, Coal Level Iii
- Old Colliery
- Old Dyffryn Colliery
- organisation
- Otterpool Quarry
- Prince Of Wales Colliery
- Priory Tunnel
- publication
- Gabon Q1000
- Samtan Art Mine Q100000050
- Monte Viso Tunnel
- Ferenc-hegyi Cave
- Feszti Cave
- Grotta Porcinara
- Q100151800
- Faro Q1001646
- Магілёўскі кар’ер
- Erawan cave
- Claypool Tunnel
- Borax Museum
- Lourdes Grotte Schloss Ebersberg Q100255910
- Unknown
- Pfaffenkammer
- Andirilena Cave
- Kyzyl-Yar
- Q100287554
- Q100287874
- Biogna Tunnel
- Tihanyi Forrás Cave
- Buk û Zava Q1003208
- Q100323512
- Percée de Thoraise
- Tunnel de Peter Both
- Bulmer Cavern
- Raddatz Rockshelter Q100490961
- The Gambia
- Hochbunker Von-Hein-Straße
- Bundesbank bunker
- Guinea
- Guinea-Bissau
- Areni-1 cave complex
- Mariengrotte
- Gemünder Tunnel
- Wenyi Road Tunnel
- Ivory Coast
- Hochbunker Allende-Platz
- Hemingfield Colliery
- Cameroon
- Bunker Eichenthal
- Bunker Garzau
- Harnekop Bunker
- Bunker Hoffnungsthal
- Bunker Isweiler
- Bunker Kagel
- Tagansky Protected Command Point
- Kolkwitz Bunker
- Bunker Kunersdorf
- Bunker Kossa-Söllichau
- bunker Ladeburg
- Bunker Steinenbrück
- Bunker Schwarzer See
- Bunker Wodanstraße
- Bunker Töpferweg Q1009580
- Strausberg Bunker
- Bunker Strausberg Q1009585
- Bunker Wollenberg
- bunkers in Emden
- Bunkerhöhle
- Návojná Tunnel Q100981338
- Steenberg
- Áfonya utcai Cave
- Cape Verde
- Bahtagurhoaŋka
- Lassenjuonne
- Thomas-Müntzer-Schacht Q101113354
- Kusain Kolbaev tunnel
- Gombasek Cave
- József-hegyi No 4. Cave Q101207443
- Korallos Cave
- Campolivar Quarries
- Pedrereta de la Caseta de Xoca
- Arènes de Doué-la-Fontaine
- Lesotho
- Bekey Cave
- Liberia
- Sáttosadji Q101416876
- Buddha's Hand Cave
- East-Borneo Maatschappij
- Lingjiao Cave
- Hehuanshan Tunnel
- Daguanshan Tunnel
- Homok-hegyi Cave
- Bimbó Cave
- Ziribári Cave
- Csévi Cave Q101457013
- Tram tunnel in Bratislava
- Burgholztunnel
- Burgsinn Tunnel
- Beavertail Mountain Tunnel
- Cau dels Emboscats
- grotte du Serment
- Tunnel Auerswalde
- Libya
- Herberz-1 mine
- Látó-hegyi Cave Q101659729
- Osek tunnel
- Burschenhöhle
- Bushman Paradise Cave
- Buschtunnel
- Busserltunnel
- Butterbergtunnel
- State Highway 20 Tunnel
- Byfjord Tunnel
- Bystrianska Cave
- Malawi
- Bømlafjord Tunnel
- Ejerslev moler Quarry
- Büdinger Tunnel
- Sárkánylyuk Cave
- Penybryn Lead Mine
- Ashton Lead Mines
- Llandonna Lead Mine
- Pant Gwyn
- Tan Bwlch Lead Mine
- Nantycar Copper And Lead Mine
- Nant-Y-Garw lead mine Q102081617
- Aberllyn Mine
- Bodgynydd Lake Lead Mines
- Caer Llugwy Lead Mine
- Clogwyn Gwlyb Lead Mine
- Bettws Lead Mine
- Ceirionydd Lead And Zinc Vein
- Gorlan Lead Mine
- Hafna Lead Mne
- New Pandora Mine
- Park Lead Mine
- Pen-Yr-Allt
- Pool Adit And Lead Mine Mill
- Porth-Neigwl Lead Mine
- Ffrith Tal-Y-Llyn Mine
- Trecastle Lead Mine
- Vale Of Conway Mine Q102081667
- Wheal George Lead Mine
- Alltycrib Mine
- Blaen Ceulan Lead Mine
- Bronfloyd Lead Mine
- Bryndyfi Lead Mine
- Bwlch Cwmeruin
- Cefn Gwyn Lead Mine
- Graig Goch Lead & Zinc Mine
- Cwmbrwyno Lead Mine
- Cym-Y-Darren And Twll-Y-Mwyn Copper Mines Q102081706
- Cwmerfin Lead Mine
- Cwmrheidol Mine
- Cwmsebon Mine
- Cwmsymlog Lead Mine
- Copa Hill
- Great Daren Mine
- Darren Lead Mine Ore Hopper
- Esgair Hir Lead Mine
- Esgair Lle
- Esgairmwyn Lead Mine, Mine Workings Complex
- Fairchance Lead Mine (South)
- Florida Lead & Zinc Mine
- Glog Fach Lead Mine
- Glogfawr Mine
- Goginan Lead And Silver Mine
- Grogwynion Lead Mine
- Gwaith Bron-Floyd Lead Mine
- Hafan Lead Mine
- Pen Rosser and Pentre Mawr Lead Mine Levels
- Level Fawr Yard
- Llanfair Lead & Silver Mine
- Llancynfelyn
- Llawr-Y-Cwm Bach
- Vaughan Mine
- Llwyn Teifi Lead Mine
- Powell's Llywernog Mine
- Logaulas Lead Mine
- Nantycreiau Lead Mine
- Nant-Yr-Arian
- Pencraig Ddu Lead And Silver Mines
- Penrhiw Lead & Zinc Mine
- Plynlimon Lead Mine
- Rhysgog Lead Mine
- Tanyrallt Lead Mine
- Temple Lead Mine
- Ty-Llwyd Lead Mine
- Wemyss, Frongoch Lead Mine
- Ystumtuen Lead Mine
- Cae-Sara Lead Mine
- Ndinas Fawr Lead Level
- Neuadd Fawr Level Lead
- Pemrhiw Rhaiadr Lead Mines
- Pen-Y-Garreg
- Pwll Priddog Level (Lead)
- Vale Of Towy Lead Mine
- Ystrad Ffin Lead Mines
- Caer Gwaith Lead Mine
- Cefn-Yr-Ogof Lead Mine
- Craig-Y-Glyn Lead Levels
- Esclusham Mountain Lead Mines
- Maeshafn Lead Mine
- Nant Lead Mine, Chimney
- Tyddyn Morgan Lead Mine
- Coed-Y-Garreg
- Grange Lead Mines
- Maeshafn Lead Mine
- Mwyn-Y-Bwll Lead Mine
- Olwyn Goch Lead Mine
- Llangan Lead Mine
- Bwlch-Y-Plwm
- Pen-Yr-Allt Lead Mine
- Brynposteg Lead Mine
- Bwlch Creolen Lead Mine
- Cwmfron Lead Mine
- Gorn Lead Mine
- Bryntail Mine, Gundry's Shaft
- Gwestyn Copper And Lead Mine
- Hore Mine, Workings
- Llanerchyraur Lead Mine
- Mwnglawdd Cwm Orog Lead Mine
- Nant Iago Lead Mine
- Nant-Yr-Eira Mine
- North Llangynog Lead Mine
- Penyclun Lead Mine
- Pen-Y-Crogbren
- Rhoswydol Lead Mine
- South Llangynog Lead Mine
- Twll Will Rhiwfelen
- Vachwen Lead Mine
- Van Lead Mine
- Nanty Lead Mine
- Llanfyrnach Lead Mine
- Creigiaullwyrdion Lead Mine
- Cwm Elan Lead Mine Complex
- Llandrindod Lead Mine
- West Fedw Lead Mine
- Minera Lead Mines: Halvans Processing Works
- Pencoed Lead Works
- Moel Bowydd Zinc and Lead Mine
- Esgairmwyn Lead Mine, Refining Mill
- Minera Lead Mines: Meadow Shaft Lead Mine
- Minera Lead Mines: Roy's Shaft Lead Mine
- Minera Lead Mines: Taylor's Shaft Lead Mine
- Minera Lead Mines: Lloyd's Shaft Lead Mine
- Tyddyn Gwladys Lead Mine
- Penygist Lead Mine
- Tynyfron Mine
- Caegynon Mine
- Bwlchglas Mine Q102082043
- Llwynmalis
- Creigiau Eglwyseg Lead Mine
- Eglwyseg
- Gwter-Siani
- Cwm Bach Mine
- Nantybrain/Abergwesyn
- Bryn-Yr-Afr Lead Mine
- Dalrhiw Lead Mine
- Tyddyn Wilym Lead Mine
- Nant Y Car Mine Buildings
- Camddwr Metal Mine
- South Cambrian Lead Mine
- Bwlch-Ystyllen Lead Mine
- Camdwrmawr Mine
- Nant-Y-Moch Metal Mine
- Llyn Llygad
- West Wye Valley Lead Mine
- Wye Valley Lead Mine East
- Camdwr Bach Lead Mine
- Bugeilyn
- Bendigaid Mine
- Brynhope Lead Mine
- Florida Mine Shafts
- Cwm Mawr Mine
- Penlan Fach Mine
- Fairchance Lead Mine (North)
- Fairchance Mine (South), Bell Pits
- Esgair Mwyn Reservoir
- Ponterwyd Lead Mine Q102082218
- Bog Mine
- Clara
- Pont Marteg
- Yr Wylorn
- Dolhelfa-Isaf
- Esgair-Ddu Lead Mine
- Craig-Y-Mwyn Lead Mine
- Nant Ddu Mine
- Hyddgen Lead Mine
- Nant Gelli
- Esgairgaled
- Blaen Cennant Lead Mine
- Cefn Pawl Mine
- Dyfngwm Lead Mine
- Nant Nod
- Pen Dylife
- Pant-Yr-Hirian Lead Mine Workings
- Court Grange Lead Mine
- Pant-Y-Bontbren And Erglodd Lead Mine
- Bryn-Yr-Arian Lead Mine
- Pen-Sarn Lead Mine
- Tyn-Y-Pwll Disused Lead Mine
- Ty-Newydd Lead Mine
- Henfwlch Lead Mine
- Eaglebrook Lead Mine
- Craignant-Bach Lead Mine
- Possible Lead Mining Levels
- Crown Lead Mine
- Cym-Byr Lead Mine
- Y Drum Lead Mine And Quarry
- Cae Conray Lead Mines.
- Aber-Daunant Lead Mine
- Caethlu Mine