Photo ISS013-E-14843, taken from the International Space Station. (Click the picture for more info on it & the quarry)
On the right is Calcite, the world's largest open-pit limestone quarry. I'm not sure of the official dimentions, but it's a bit more than a mile wide just after it turns to the north.
I knew it was enormous, but I didn't realize it was several times the size of the entire town.
Feudalism: Serf & Turf