The world's largest waterfall, by volume, is actually located in a cave system in Zambia and Zimbabwe. It's called the Mosi-oa-Tunya, which translates to 'the smoke that thunders'.
This incredible natural wonder is often overshadowed by its more famous above-ground counterpart, Victoria Falls. But Mosi-oa-Tunya is a staggering 350 meters tall and flows at a rate of 10 million liters per second, making it the largest waterfall in the world by volume.