Tram Rails, Bwlch-y-Plwm. Photo by Iain Robinson
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Tram Rails, Bwlch-y-Plwm. Photo by Iain Robinson

Bwlch-y-Plwm, the junction. Photo by Iain Robinson
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Bwlch-y-Plwm, the junction. Photo by Iain Robinson

Stope and Shaft, Nant Gefail-y-Meinars. Photo by Iain Robinson
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Stope and Shaft, Nant Gefail-y-Meinars. Photo by Iain Robinson

Junction Under the Moelwyns, photo by Iain Robinson
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Junction Under the Moelwyns, photo by Iain Robinson

Adit Light, Brynglas, photo by Iain Robinson
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Adit Light, Brynglas, photo by Iain Robinson

“Through Passage” photo by Iain Robinson
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“Through Passage” photo by Iain Robinson

Foel Gron, the daylight chamber.
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Foel Gron, the daylight chamber.

Looking outbye, Chwarel Gethin Jones, Snowdonia.
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Looking outbye, Chwarel Gethin Jones, Snowdonia.

The face in the tunnel…
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The face in the tunnel…

Stacked deads, Hafod Boeth mine
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Stacked deads, Hafod Boeth mine