Image: via mit-skagen
Waterfalls in caves prove that constant pounding is not like making a hole in water. Often, they have flowed over the same rock for so many hundreds of years that it finally did cave in and let the water have its way. Or, the rock was porous to begin with and rivers and streams quickly made their way in. Though popular in the virtual and gaming world, waterfalls inside caves are not very common in the real world – if you’re not counting trickles and caves behind waterfalls. We’ve found five around the world that made the cut.