In South Tyrol several locations with earth pyramids can be found. The pyramids of Ritten are made up of three different locations: Oberbozen, Klobenstein and Unterinn. Earth pyramids are a natural phenomenon that appears only on a specific substrate in a steep slope. Draining rainwater cuts deep drains in the slope until it gets stopped by rocks. By moving around them the water creates the water creates the earth pyramids. As soon as an earth pyramid loses its protecting stone, it will vanish. But the good thing is: While the one earth pyramid disappears due to this process, another one comes into the world. The earth pyramids of Oberbozen are up to 15 metres high and at about 25.000 years old.