The Albion Colliery Disaster
Elan Valley Aqueduct. Knighton Tunnel workings.
Elan Valley Aqueduct Frydd Wood conduit...
Elan Valley Aqueduct Downton syphon inlet
Elan Valley Aqueduct construction
Elan Valley Aqueduct Carmel looking East
Elan Valley to Birmingham Aqueduct 62 M 60 CHS...
