Posted in Web Khewra Salt Mine (Mayo Mine), Khewra, Jhelum District, Punjab Province … July 4, 2025 The underground Khewra Salt Mine (or Mayo Salt Mine) is Pakistan’s largest and oldest salt mine and the world’s second-largest salt mine. Also, it is a major tourist attraction, visited up to 250,000 visitors a year. https://www.mindat.org/loc-15871.html