The Kletno Bear Cave is the most beautiful cave in Poland. Students of the Faculty of Geodesy and Cartography at the Wrocław Agricultural University have been conducting a level survey of the cave for more than twenty years during training sessions of the Scientific Circle of Surveyors. The survey is used for the scientific study of the Sudetes, as well as for assessing the safety of tourist routes in the Cave. Measurements are made with precise leveling equipment and the readings are further refined by laboratory tests. The area of the Cave is characterized by a complex geological structure. Two tectonic faults are located in the immediate vicinity of the Cave vicinity. The results of the studies indicate the instability of geological and tectonic structures in the analyzed area.