What is the deepest river in the world?
Congo River
The great Congo River
The great Congo River (Kongo: Nzâdi Kôngo; French: Fleuve Congo; Portuguese: rio Congo), formerly known as the Zaire River under the Mobutu regime, is the second longest river in Africa, shorter  only than the Nile, as well as the second largest river in the world by discharge volume, following only the Amazon. It is also the world's deepest recorded river, with measured depths in excess of 220m (720ft).[2]
The Congo-Lualaba-Chambeshi River system has an overall length of 4,700km (2,920mi), which makes it the world's ninth-longest river. The Chambeshi is a tributary of the Lualaba River, and Lualaba is the name of the Congo River upstream of Boyoma Falls, extending for 1,800km (1,120mi).