Waterfalls are natural wonders where water flows over a vertical drop or a series of steep drops in the course of a river or stream. They’re often found in mountainous or hilly terrain, where erosion and geological activity shape the landscape. The thunderous sound, misty spray, and powerful rush of water make waterfalls both mesmerizing and dramatic. Some, like Niagara Falls or Angel Falls, are famous for their size and beauty, drawing visitors from all over the world.