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Photos by Tony Smith: Penarth
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https://www.facebook.com/uncharted.ireland/: Mizen Head
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https://www.facebook.com/uncharted.ireland/: Lissummon Tunnel
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Capt' Gorgeous: Quarry Tunnel
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Capt' Gorgeous: Usk Tunnel
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Dave_SDz: railway tunnel
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flallier: Cathédrale de gypse et de meulière
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flallier: Galerie de roulage
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flallier: Renforts métalliques
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Photos by Tony Smith: power3
Amgueddfa Cymru: Strike graffiti, Abercarn
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spartacus mills: DSC_2093
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spartacus mills: Cinema auditorium, Newbridge Memorial Hall
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Keighley Bee: Peterhead harbour
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peter.brabham: 9616 at Torpantau Brecon Beacons 1962 by John Wiltshire
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Midland Explorer Boy: Ballingham tunnelscape No.3
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cerij4242: Abernant tunnel maintenence