The Khewra Salt Mine in Pakistan produces 385,000 tons of salt per year, supporting the local economy as well providing a source of revenue from exports to other countries. While it is the largest of Pakistan’s mines by far, it delves into only a tiny fraction of a truly massive salt deposit running along much of the 186 mile Salt Range mountains from which it is mined. The deposit is as much as 1,600 feet deep in places, and miles in width. Estimates of the total reserves in Pakistan are all over the place, but are always going up.