Devetashka Cave, discovered in 1921, is one of the biggest caves in Europe. According to archaeological research, it sheltered people since the late Paleolithic era. Devetashka cave is a monument of culture and a place of national and international significance and protection. This natural phenomenon is about 1500 meters long and has a huge entrance - 35 meter high and 55 meter wide. The cave has 11 underground lakes and rather beautiful cave formations.