<Table> <Tr> <Td_colspan="2"> Danube </Td> </Tr> <Tr> <Td_colspan="2"> River </Td> </Tr> <Tr> <Td_colspan="2"> The Danube in Vienna </Td> </Tr> <Tr> <Th> Countries </Th> <Td> Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, Ukraine </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Cities </Th> <Td> Ulm, Ingolstadt, Regensburg, Linz, Vienna, Bratislava, Győr, Budapest, Dunaújváros, Vukovar, Novi Sad, Zemun, Belgrade, Pančevo, Smederevo, Drobeta Turnu - Severin </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Primary source </Th> <Td> Breg </Td> </Tr> <Tr> <Td> - location </Td> <Td> Martinskapelle, Black Forest, Germany </Td> </Tr> <Tr> <Td> - elevation </Td> <Td> 1,078 m (3,537 ft) </Td> </Tr> <Tr> <Td> - length </Td> <Td> 46 km (29 mi) </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 48 ° 05 ′ 44" N 08 ° 09 ′ 18" E ﻿ / ﻿ 48.09556 ° N 8.15500 ° E ﻿ / 48.09556; 8.15500 </Td> </Tr> <Tr> <Th> Secondary source </Th> <Td> Brigach </Td> </Tr> <Tr> <Td> - location </Td> <Td> St. Georgen, Black Forest, Germany </Td> </Tr> <Tr> <Td> - elevation </Td> <Td> 940 m (3,084 ft) </Td> </Tr> <Tr> <Td> - length </Td> <Td> 40 km (25 mi) </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 48 ° 06 ′ 24" N 08 ° 16 ′ 51" E ﻿ / ﻿ 48.10667 ° N 8.28083 ° E ﻿ / 48.10667; 8.28083 </Td> </Tr> <Tr> <Th> Source confluence </Th> <Td> </Td> </Tr> <Tr> <Td> - location </Td> <Td> Donaueschingen </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 47 ° 57 ′ 03" N 08 ° 31 ′ 13" E ﻿ / ﻿ 47.95083 ° N 8.52028 ° E ﻿ / 47.95083; 8.52028 </Td> </Tr> <Tr> <Th> Mouth </Th> <Td> Danube Delta </Td> </Tr> <Tr> <Td> - coordinates </Td> <Td> 45 ° 13 ′ 3" N 29 ° 45 ′ 41" E ﻿ / ﻿ 45.21750 ° N 29.76139 ° E ﻿ / 45.21750; 29.76139 Coordinates: 45 ° 13 ′ 3" N 29 ° 45 ′ 41" E ﻿ / ﻿ 45.21750 ° N 29.76139 ° E ﻿ / 45.21750; 29.76139 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Length </Th> <Td> 2,780 km (1,727 mi) </Td> </Tr> <Tr> <Th> Depth </Th> <Td> 1--8 m (3--26 ft) </Td> </Tr> <Tr> <Th> Basin </Th> <Td> 801,463 km (309,447 sq mi) </Td> </Tr> <Tr> <Th> Discharge </Th> <Td> for before delta </Td> </Tr> <Tr> <Td> - average </Td> <Td> 7,000 m / s (247,203 cu ft / s) </Td> </Tr> <Tr> <Td_colspan="2"> Discharge elsewhere (average) </Td> </Tr> <Tr> <Td> - Passau </Td> <Td> 580 m / s (20,483 cu ft / s) 30km before town </Td> </Tr> <Tr> <Td> - Vienna </Td> <Td> 1,900 m / s (67,098 cu ft / s) </Td> </Tr> <Tr> <Td> - Budapest </Td> <Td> 2,350 m / s (82,989 cu ft / s) </Td> </Tr> <Tr> <Td> - Belgrade </Td> <Td> 4,000 m / s (141,259 cu ft / s) </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Course of the Danube, marked in red </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Danube </Td> </Tr>

Where is the mouth of the danube river located