15. The river Jordan flows out into the Dead sea. 16. The biggest delta in the world is the Ganges Delta. 17. The capital city that stands on the river Danube is Belgrade. 18. The Japanese call their country as Nippon. 19. The length of the English channel is 564 kilometres. 20. The world's oldest known city is Damascus. 21. The city which is also knownas the City of Canals is Venice. 22 The country in which river Wangchu flows is Myanmar.