The Congo River in Africa is officially the deepest river in the world, reaching a staggering maximum depth of approximately 220 meters (722 feet) in its lower sections. This incredible depth is found in the turbulent canyons and cataracts downstream from Kinshasa, where the river narrows and the force of the water carves deep trenches into the bedrock. To put this in perspective, the Congo is deeper than the height of the Space Needle in Seattle. Because it is so deep and powerful, it is one of the few rivers that remains mostly unnavigable in certain sections despite its massive volume. This unique geography has created isolated pocket environments within the river, leading to the evolution of specialized fish species that are found nowhere else on Earth, adapted to the extreme pressure and darkness of the river's deep-water trenches.