Congo River, also known as Zaire River, crosses the equator twice. Congo River is the deepest river in the world and the second longest river in Africa.The river ranks as the … ninth longest river in the world with its overall length of 4,700 km. The famous Boyoma Falls or Stanley Falls is in Congo River.The Chambeshi River in Zambia is regarded as the source of the Congo River.he river ranks as the … ninth longest river in the world with its overall length of 4,700 km. The famous Boyoma Falls or Stanley Falls is in Congo River. The Chambeshi River in Zambia is regarded as the source of the Congo River.