We visited two wonderful caves - one was a salt mine and another an ice cave. The best thing about the salt mine was that we got to ride down the slides (it was a lot of fun) and there were many cool salt crystals in all the walls. The worst thing was the last bit when we were riding on a small train through a narrow passage. The ice cave was very cool - we had to carry our own oil lamp and the gust of wind at the entrance/exit was really impressive (as in I am not sure small kids would be OK with it :) And the worst thing was that there was not enough light to really appreciate all the ice formations.