[ad_1] The abandoned mining tunnels at the Ruffner Mountain Nature Reserve in Birmingham have not produced iron ore for more than 50 years, but the old man-made tunnels still provide a valuable …
Read More »[ad_1] The abandoned mining tunnels at the Ruffner Mountain Nature Reserve in Birmingham have not produced iron ore for more than 50 years, but the old man-made tunnels still provide a valuable …
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