The Irtysh is one of the rivers beginning with the letter I. It is located in western China, the Asian area of Russia and in the north-eastern part of Kazakhstan. The river is a left tributary of the Ob. Its length is 4,248 kilometers, and it is sailed over a length of 3,784 kilometers. It is a very stocked river.
The Izera is a river whose name begins with the letter I. Its length barely exceeds 164 kilometers. It is a right tributary of the river Elbe. It is mainly located in the Czech Republic, although it can be spotted on the border in Poland. Its source lies at an altitude of 980 m above sea level.