Not only do waterfalls come in all kinds of shapes and sizes, but they are also distinguished by type. There are punchbowl falls, horsetail falls, frozen falls, cascades, cataracts, you name it. But as is the nature of man, we take what we like from nature and try to one-up it. Needless to say, we also have a variety of man-made waterfalls, bubbling along around the planet. Here&rsquos a look at a few of these man-made wonders giving their natural counterparts something to worry about



