The Danube is an international river 2,857 km in length (21st in the world, 2nd longest in Europe), and its catchment area is 817,000 km2 (25th in the world). The Danube riverbed stretches through the territories of nine countries (Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania and Ukraine). The section through Serbia is 588 km long, and at a length of 230 km it runs along the state border. The Danube has exceptional complementary values along the river banks, with significant cultural and historical heritage, archeological sites, vineyards with wine cellars, as well as a canal network, marshes and special nature reserves, river beaches and much more. Sremski Karlovci is located on the right bank of the Danube.