The Congo River
Sun glint and tan sediments make the Congo River very evident amidst the luscious dark green of the surrounding rainforest. Lake Tumba can be seen near its banks, as can Lake Mai-Ndombe at the bottom right.
The Congo River (also known as the Zaire River) is the largest river in Western Central Africa. Its overall length of 4,700 km (2,922 miles) makes it the second longest in Africa (after the Nile).
Here, it marks the border between the Congo (left) and the Democratic Republic of the Congo (right).
The river and its tributaries flow through the second largest rain forest area in the world, second only to the Amazon Rainforest in South America.
The river also has the second-largest flow in the world, after the Amazon, and the second-largest drainage basin of any river, again trailing the Amazon.
Because large sections of the river basin lie above and below the Equator, its flow is stable, as there is always at least one river experiencing a rainy season.