This is how 800 million pounds of Khewra salt, often called Himalayan salt, is mined each year. Formed over 250 million years ago, and first mined in the 1200s, Himalayan salt is a mineral that was initially used as a food preservative. These days, it's more commonly used for bath salts, salt lamps, salt bricks, salt tiles and even medicines.

The Khewra Salt Mine is famous for its production of pink Khewra salt which is an 800 million-year-old, non-renewable resource. The mine is huge, comprised of a network of roughly 25 miles of tunnels. The main ground level tunnel was first dug in 1872 during the British rule. From this tunnel, the mine extends about 2,440 feet into the mountains.