Creepy Tunnel found in the forest. Mine explorer's or the Knockers from Cornish folklore?

Finding a Creepy  mine entrance in the forest just before  night fall.  Mine explorer's  or the mythical Knockers  from  Cornish Folklore.  
Wild Camping Recce turns out to be more exciting than expected. Warming, Mines and there areas are dangerous and life threatening. Do not copy or replicate. This viewing is for documentation and entrainment only.
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