Trebišnjica wellsprings group, Natural spring system in Bileća, Bosnia and Herzegovina
The Trebišnjica wellsprings group consists of three major outlets: Dejanova Pećina, Vrelo Oko, and Nikšičko Vrelo that together form a significant water source. Located at approximately 325 meters (1,066 feet) elevation, these springs feed the river of the same name.
The springs remained visible until 1967, when construction of the Trebinje-1 Hydroelectric Power Station submerged the original outlets beneath Bilećko Lake. Despite being underwater today, the spring system continues to flow beneath the surface.
The springs take their name from the Trebišnjica River, which has held central importance for local people for generations. Today, the waters remain a focal point where residents connect with their natural surroundings.
Access is available through marked paths near Bileća, where information boards explain the underground water system and its connection to the Trebišnjica River. The warmer months offer the best conditions for exploring the area and understanding how the springs connect to the broader landscape.
The system forms part of one of the world's longest sinking river systems, where water flows both above and below ground across significant distances. This geological phenomenon makes the region a rare example of how underground water shapes the landscape.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
