This Salt Mine is very well known. Their not mining salt anymore and in my opinion have turned it into a Gold Mine. The cost is 75 PLN is equal to about 25 USD per person. And from what we understand from our guide they handle over a million people a year. There is also a lot of walking and a lot of stairs. They at least have elevators to take the guests back up. Also, if you can, bring your own food since their food it not very good.