You’ll have to travel to the place where the cold water of the Nordic Sea meets the warmer water from the Irminger Sea if you want to catch a vague glimpse of the world’s largest waterfall. The only problem is, it’s underwater.
Because the cold water is dense, it sinks below the warm water and spills over an undersea cataract all the way down to the ocean floor. It’s so big that the downward flow is estimated at over 123 million cubic feet per second. Denmark Strait cataract is around 11,500 feet long (with the next largest being Angel Falls at a mere-by-comparison 3,212 feet).
It also carries an estimated 175 million cubic feet of water per second. For perspective, that’s equivalent to around two thousand Niagaras Falls. – WTF Fun Fact