When I first suggested visiting the Salt Mines to my father, he shrugged, uninterested in something as mundane as "salt." But by the end of the tour, he had changed his tune! The salt mine is tremendously impressive. You begin by walking down what seems like miles of stairs. At the bottom, you walk through dozens of rooms and passageways, many of which contain beautiful sculptures in the salt, many carved by miners over the hundreds of years that the mine had been worked. Most impressive is the enormous underground cathedral of St. Kinga. Heading past the magnificent art, you head into steep cliffs of salt and rock where men and donkeys risked their lives hauling loads up tiny rickity ladders and pulleys. The salt mine is a little hard to get to on your own just using public transportation. I usually avoid organized tours, but you have to travel through the mine in a group anyway, so it's easiest to join a bus excursion that leaves from one of the large hotels in Krakow.