A beautiful river Gradac IV

Almost in the center of the city of Valjevo-Serbia  ends Gradac River Canyon, one of the cleanest rivers in Europe. The richness of the gorge, in the forms of underground karst erosion is pronounced. There are nearly seventy, and still discovering new ones. Water quality, Gradac is one of those rivers that are largely preserved. Basin of this river also represents a habitat of a number of rare plant and animal species…