Those who are willing to clamber up the slope will find an entrance to a tungsten ore exploration adit above the workshop of the Kalouda Company. Near the adit´s mouth, we can find solid silicified crystalline mica schist, which is the oldest rock in the area (350 million years old). Traces of the movement of the Earth´s plates and traces of black tungsten ore, which was mined in Rotava in 1939–1950, are concealed in the adit´s interior.