Chacewater, GB
Killifreth Mine was a mine near Chacewater in Cornwall, England, producing at various periods copper, tin and arsenic. The engine house over Hawke's Shaft is a Grade II listed building; it has the tallest surviving chimney in Cornwall.
Listen to the audio guide for Engine House Killifreth (Hawke's Shaft) Free on WIP — starts by itself when you arrive, even with the screen off