All Himalayan salt comes from the world’s oldest salt mine in Pakistan’s Punjab province. The area is known as the great Salt Range. According to geologists, the mine was formed when shifting tectonic plates trapped an inland sea that was eventually dehydrated. The salt is what was left behind. The salt’s most distinctive characteristic is its color, which is pink (why it’s often known as Himalayan pink salt). The pink color is thought to come from the remnants of sea life that existed in the ancient ocean.
The tunnels in the mine would be developed in the 19th century. This was due to the efforts of a mining engineer from Britain who came up with a special method for tunneling further into the Salt Range. His technique is still used today.
In addition to being the oldest salt mine, it is also the world’s second largest and covers approximately 43 square miles.