Pećina Rastuša
The length of the explored channels is 570 m, and a 450 m illuminated path has been arranged for tourist visits. The interior of the cave is rich in carvings and decorations, and a special attraction is the rare phenomenon of "Tiger Skin", which exists in only two caves in Europe. The cave is a significant archaeological site where the remains of prehistoric people, a cave bear, a wolf, and unique finds of a cave lion and a rhinoceros have been found.
WWFF reference E7FF-0047, QTH locator JN84VQ, Coordinates 44.696565,17.800654 IUCN III,

The Rastuša Cave is located in the village of Rastuša on the eastern side of Hrnji hill, 17 km from Teslić, 24 km from Prnjavor and 25 km from Doboj. The length of the investigated canals is 570 m, and 450 m of lighted path was made for the tourist tour. The climate of the cave is not influenced by the external climate, so the temperature inside the cave is 13 degrees throughout the year. The interior of the cave is rich in cave jewelry: stalactites, stalagmites, saliva, draperies and large bathtubs. The wall of the caves are particularly attractive, being covered with patterns known as “Tiger’s skin”, which is created by a combination of calcite deposits and mineral solutions. This phenomenon in Europe is found only in two caves in Italy and France. The Rastuša Cave is an archaeological site, and explorations have discovered the remains of Cremanjonac and Krapinac type prehistoric humans were found, as well as the remains of a Pleistocene wolf and a cave bear (20,000 years old). The remains of two prehistoric hearths were found in the cave, in one of them fire burned for 150 years, and in the other for even 400 years. During 2008, experts from the University of Cambridge from Great Britain stayed in the Rastuša cave, and during their research, they found the remains of a cave lion and a cave rhinoceros, which is something completely new for the territory of Republika Srpska and beyond.