Next day we went to a salt mine, Kopalnia Soli Wieliczka. This salt mine has over 700 years of history and is still producing salt. It is also one of the 12 UNESCO first released in 1978.
Getting there from Krakow is easy, just by bus for half and hour. Advance booking is preferable but not that necessary, because you have to join a guided tour. They have 2 different routes for visitors to experience. Tourist route is about 3 hours long. It is a guided tour to walk you through the mine. Another option is Miner route, which you have to put on an overall and helmet and do a few hour of miner. You will get your certificate afterward. We picked the tourist route but at the end we think we should be the miner because we heard the "Miner" working when we were walking along the tourist route.
The mine is huge, with lots of information telling you the life and work of the miners in the old days. It is hardly imagined that they used log to support the structure of mine and as time went by, the logs were squeezed down into a pillar like structure.
The tourist route is full of sculpture made by the salt rock. It also has some sculpture showing the miner's life in the old days.