The Tisza River
Tisza River, (Serbo-Croatian: Tisa), a river in eastern Europe and a major tributary of the Danube. From its source in the Carpathian Mountains of Ukraine, it flows westward into Hungary and then southward to join the Danube near Belgrade, Serbia and Montenegro. The Tisza is about 800 miles (1,300 km) long, and much of its course is through the Great Alfold, a rich agricultural region that is part of the Pannonian Plain. Principal tributaries are the Körös, Zagyva, and Mureş (Maros) rivers. A network of canals links the river with the Danube. Szeged, Hungary, is the only large city on the river.