<P> The West Siberian Plain, also known as Zapadno - sibirskaya Ravnina, (Russian: За́падно - Сиби́рская равни́на) is a large plain that occupies the western portion of Siberia, between the Ural Mountains in the west and the Yenisei River in the east, and by the Altay Mountains on the southeast . Much of the plain is poorly drained and consists of some of the world's largest swamps and floodplains . Important cities include Omsk, Novosibirsk, Tomsk and Chelyabinsk . </P> <P> The West Siberian Plain is located east of Ural Mountains mostly in the territory of Russia . It has been described as the world's largest unbroken lowland--more than 50 percent is less than 100 metres (330 ft) above sea level--and covers an area of about 2.6--2.7 million square kilometres (1.0 million square miles) which is about one third of Siberia, extending from north to south for 2,400 km (1,490 mi), from the Arctic Ocean to the foothills of the Altay Mountains, and from east to west for 1,900 km (1,180 mi) from the Ural Mountains to the Yenisei River . </P>

Where is the west siberian plain located on a map