I took the original photograph of these stone ruins of an old Tin mine in Cornwall, when I was there in the summer. I can’t believe that they have mined Tin, plus other metals, in Devon and Cornwall since the Bronze Age with the last mine, South Crofty, being closed in 1998.
The Tin mines are also the reason the Cornish Pasty is made the way it is, in a D shape with a thick crust. The miners were poor, so they were filled with chopped up potato, onions and swede. Meat was added to the ingredients later on which is how it is eaten today.