Ob River

This is a major river in western Siberia, Russia, and the World’s 7th longest river. This river is 3,395 miles long, with a drainage area of 2,990,000 square kilometers and an average discharge of 12,475 cubic meters’ per-second. The Ob forms 16 miles southwest of Biysk in Altai Krai at the confluence of the Katun and Biya rivers. It is the westernmost of the three great Siberian rivers that flow into the Arctic Ocean (the other two being the Yenisei River and the Lena River). The Gulf of Ob is the world's longest estuary.

Picture Source: Collected from Internet