When you look at Hierve El Agua from a distance you might think it is just another waterfall. Upon closer inspection you will change your opinion, it must be a frozen waterfall, but how in this hot climate? Finally you will find the truth - it is not a waterfall at all but a rock formation, which looks like a waterfall. The mineral waters, which drip down the cliff, are to blame for this natural wonder. They leave their minerals, mostly calcium carbonate behind. Year after year it keeps piling up, like stalactites, until it finally becomes the "waterfall" of today. It is a pretty but unfortunately not a very populated place, go there at your own risk.