Congo River
From Tardis Wiki, the free Doctor Who reference
The Congo River was a stretch of water that the Doctor once went rafting on along with David Livingstone. The Eighth Doctor noted it had "snakes, rapids and headhunters" but claimed to prefer the River Nile. (COMIC: The Power of Thoueris!)
Richard Francis Burton co-discovered the source of the Congo, Lake Tanganyika. (PROSE: The Book of the War)
