Zarski katun, Mucnica
Altitude of the entrance: 1757 m
Length: around 800 m
Depth: around 150 m
The longest cave on the territory of the municipality of Mojkovac is Cavcanica, the unspoiled cave of great value. The length of 800 meters and 150m depth has been researched. Cave has two main parts: one mainly pit cave like, and the other with horizontal tunnels with great concentration of sediment. The second part has a significant water accumulation and very beautiful cave decorations. Larger spaces are connected through the network of tunnels often spreading in several levels. The cave is inhabited by birds, of the species Pyrrhocorax graculus.