http://www.bbc.co.uk/news/av/uk-41325581/what-s-it-like-to-go-down-a-disused-400-year-old-tin-mine
andys Well-known member Sep 20, 2017 #1 http://www.bbc.co.uk/news/av/uk-41325581/what-s-it-like-to-go-down-a-disused-400-year-old-tin-mine
