Waterfalls are often judged by which are the tallest or have the largest volume of water, but there's so much more about them to know. They can make cliffs, produce a dozen different kinds of ice, and have tiny fish crawling up them using suction cups.

Waterfalls are some of nature's most dynamic features, formed primarily by the process of erosion as water flows over layers of hard and soft rock. A fascinating fact is that the world’s tallest waterfall isn't actually on land; it is underwater in the Denmark Strait, where cold water falls over a massive drop of 11,500 feet into warmer water. On land, the title belongs to Angel Falls in Venezuela, which is so high (3,212 feet) that the water often turns into mist before it even hits the ground. Another fun fact is that Niagara Falls actually moves; due to the sheer force of the water, the edge of the falls recedes toward Lake Erie by about one foot every year. Furthermore, the volume of water can be staggering; Victoria Falls in Africa is considered the largest "sheet" of falling water in the world, creating a spray that can be seen from 30 miles away. There are even "ephemeral" waterfalls that only appear after heavy rain, and "blood falls" in Antarctica that appear red due to iron-rich saltwater.