Reply to post: Re: King Arthur's Labyrinth

Heart of darkness: Inside the Osówka underground city

Humpty McNumpty

Re: King Arthur's Labyrinth

There are further tunnels without cheesy welsh folk tales that you can visit separately http://www.corrismineexplorers.co.uk/ and of course the slate mines of Blaenau Ffestiniog https://www.llechwedd-slate-caverns.co.uk have been open to the public as an attraction longer still. (Includes this insanity https://www.zipworld.co.uk/adventure/detail/bounce-below )

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