If like me, you have an interest in industrial archaeology, these might pique that interest. Cornwall has a long history of tin mining (along with silver, lead & gold), stretching back to prehistoric times. Tin from Cornish mines has turned up in Phoenician wrecks, indicating a trade with Mediterranean civilisations & a history of mining going back thousands of years. More recent relics of this are the engine houses that dot the landscape. Now ruins, they add interest to a landscape, or qualify as photographic subjects in themselves.
I've posted these images to begin what I'd like to see turn into a thread on industrial archaeology photography. So if you're interested, post away.
This engine house is the Greenburrow engine house, which served the Ding Dong mineral mine. The surrounding heath has evidence of prehistoric mining. Location is just off the Morvah - Madron road, west of Penzance, grid reference: SW434 344