Threlkeld Quarry near Keswick was formerly a granite quarry which supplied, amongst other things, some of the ballast for what is now the West Coast Main Line over Shap. The quarry was in operation from the 1870s until 1982.
The Threlkeld Quarry and Mining Museum is quite the visitor attraction these days, especially if you fancy riding on the little narrow guage line that takes visitors up into the quarry itself.
here. There's even steam on certain days, with Sir Tom!
I had picked the day of my visit recently to coincide with one of the Trust's 'working days', to see these old excavators in action. Fascinating!
Photos © Skip Cottage