Just recently, I posted about some amazing places on Earth and had mentioned Wieliczka Salt mines, and here is a post about another salt mine:
The Khewra salt mines~ the SECOND LARGEST IN THE WORLD!!
A friend shares her experience visiting them: Pakistan has salt mines too. Khewra is one of them. We went there and it was BEAUTIFUL! It was hot outside, but inside the temperature was cold, not normal, it was cold. Naturally cold! There was an entire restaurant whose counters, shelves and everything was made out of salt. There was a MASJID made of salt!!!!!! There was a model of Minar-e-Pakistan made of salt. And there were small lakes too and salt bridges..!!
Geologists put the age of rock-salt found in Khewra at about 600 million years. In geological timescale this time period is called Precambrian.
- Salts of the earth (kottke.org)