"1890s HISTORICAL RELIEF MAP CHART SHOWING TERRAIN, TOPOGRAPHY, ENVIRONS Approximate Image Size : 5 1/2 X 2 1/4 inches Approximate Overall Size: 7 X 10 1/2 inches Scale : 1: 380,000 The Congo is the largest river in Western Central Africa. Its overall length of 4,380 km (2,720 mi) makes it the second longest in Africa (after the Nile). If the Chambeshi River is taken as the source, the overall length increases to 4,670 km (2900 mi). The river and its tributaries flow through the second largest rain forest area in the world. The sources of the Congo are in the highlands and mountains of the East Africa Rift, as well as Lake Tanganyika and Lake Mweru, which feed the Lualaba River, which then becomes the Congo below Boyoma Falls. The Congo flows generally west from Kisangani just below the falls, then gradually bends southwest, passing by Mbandaka, joining with the Ubangi River, and running into the Pool Malebo (Stanley Pool). Kinshasa (formerly Léopoldville) and Brazzaville are on opposite sides of the river at the Pool, then the river narrows and falls through a number of cataracts in deep canyons (collectively known as the Livingstone Falls), running by Matadi and Boma, and into the sea at the small town of Muanda.

The Ubangi River (also Oubangi) is a major tributary of the Congo River in Central Africa. It is considered to begin at the junction of the Mbomou and Uele Rivers, flows west for about 350 km, then bends to the southwest, passes through Bangui, then flows south for another 500 km to the Congo. Together with the Congo River, it provides an important transport artery for river boats between Bangui and Brazzaville."

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