The Kolubara River is a significant waterway located in Serbia. It flows through the central part of the country, primarily in the Kolubara District. The river is approximately 75 kilometers long and is known for its picturesque landscapes and natural beauty. The Kolubara River is an important tributary of the Sava River, contributing to the region's water system. It plays a vital role in local agriculture and provides water for irrigation. The river also supports various ecosystems, making it a valuable natural resource for both wildlife and the surrounding communities.