But the miners who worked there did more than just mine salt.
It is an astonishing sight, one that draws over a million tourists from around the world each year.
It is a show-stopper, yet it is only one of several attractions.
Since 1978, Wieliczka Salt Mine has been one of UNESCOs World Heritage Sites.
Thanks Paul for the tip.
Sources:Wikipedia,UNESCO,Cracow-life,
