Lillafüred, a little health-resort at the foot of Mount Bükk lies in the vicinity of Miskolc, a city in NE-Hungary. There are two show caves, the cave „Anna-barlang” and the cave „István-barlang”. The geology, the history of development and the exploration history of these caves are very different but they were opened to the public within very similar circumstances, when Lillafüred, as a health-resort was built up. From that time on their history has been almost the same