How do waterfalls form? Share on Facebook Share Twitter Sharing Options Share on Facebook Share Twitter Plus one on Google Plus Save on Stumble Upon Pin on Pintrest Share on Reddit By How It Works Team · 4 years ago They are one of the most spectacular and majestic sites in nature, but how do waterfalls form? Find out in just 30 seconds with our simple explanation, complete with illustrations! Find the answer to more baffling questions in How It Works magazine. Order it in print, download it onto your digital device or subscribe today to ensure you never miss an issue! Plus, take a look at: Which is the world’s tallest waterfall? How do waterfalls freeze? Does the sound of running water make us want to pee?