Khewra is a famous salt mine located in the Punjab region of Pakistan. It is one of the oldest and largest salt mines in the world, discovered in 320 BC. The mine produces high-quality rock salt, which is used for various purposes, including cooking and industrial applications. The Khewra Salt Mine is a popular tourist destination, attracting visitors with its stunning underground chambers and salt formations. It features a mosque, a small lake, and even a train that takes tourists through the mine. The site is a significant part of Pakistan's cultural heritage and economy.