A river in south-eastern Europe, the longest tributary of the River Danube, which rises in the Carpathian Mountains of western Ukraine and flows 960 km (600 miles) westwards into Hungary, then southwards, joining the River Danube in Serbia north-west of Belgrade.
A river in southeastern Europe, the longest tributary of the Danube River. It rises in the Carpathian Mountains of western Ukraine and flows west for 600 miles (960 km) into Hungary and then south to join the Danube River in Serbia northwest of Belgrade.