The Bükk Mountains are a section of the North Hungarian Mountains of the Inner Western Carpathians. Much of the area is included in the Bükk National Park. Although Kékes, the highest point in Hungary, is not here but in the nearby Mátra Mountains, the average height of the Bükk Mountains–with more than 20 peaks higher than 900 m–exceeds that of Mátra. The highest point of Bükk is Istállóskő (959 m), third highest in Hungary after Kékes and Galyatető.
There are 1115 known caves in the mountain range, including István-lápa, the deepest cave in Hungary (254 m), the archaeologically important Szeleta cave, the Cave Bath (a main tourist attraction of Miskolc-Tapolca), the Anna Cave, and the István Cave. 52 of the caves are protected because of their fauna and microclimate.