The Resavska Cave lies in the eastern Serbia in the vicinity of the town of Despotovac (20 km). The cave is 52 km from the Belgrade-Niš motorway, 152 km from Belgrade, and 120km from Sokobanja. The length of the cave totals to 2,850 meters and the tourist paths is 800 m long. The air temperature is 7oC and the average humidity 80%-100%. The Resava Cave consists of three floors of passages and halls connected by artificial tunnels and decorated by pillars and coral-like calcite deposits in various colours. Only parts of the first and second floors (Upper and Lower Gallery) have been prepared for visits. An underground river flows through the lowest floor (Third Gallery). The visitor to Resava can tour its numerous halls with different cave ornaments. The cave is very rich in cave ornaments of various shapes and colours and is richer than other tourist caves in the concentration of its decorations. Source: http://en.wikipedia.org/wiki/Resavska_cave