Rhosesmor branch tunnel.
Tunnel Portal and Tunnel, Llanllyfni
Usk Railway Station, early 1900 - colourised
Era Quarry, Ceinws / Esgairgeiliog
One of the railway tunnels beside the Mawddach...
Entrance of the Rhiwgreiddyn quarry
In the open chamber at Rhiwgreiddyn slate quarry
Experimental round tunnel
Tunnel at Esgairfoeleirin quarry
Entrance to a lower level tunnel at...
Aberllefenni quarry, last week of underground...
Ysgol cybi
Cambrian Railways, Concreted Tunnel.
Cambrian Railways, Knighton.
Fred Balde and George Sims at Dock Street,...
Construction of the Penyclip Tunnel A55
Conwy Tunnel A55 under construction late 1980`s
A55 ROAD TUNNEL, RIVER CONWY
WHITEHOUSE TUNNEL SOUTH PORTAL, LLANGOLLEN CANAL
WHITEHOUSE TUNNEL NORTH PORTAL, LLANGOLLEN CANAL
ASHFORD TUNNEL, BRECKNOCK AND ABERGAVENNY CANAL
