The formation of the pyramids in Terento probably dates back to 1837. Because of a strong storm, the Ternerbach River swept away 3 residential houses, 16 mills, 13 beaters, a smiths and a sawmill. 13 people died during this storm. It is very likely that the slope started to disintegrate because of this storm. Over the following decades, the erosion had an impact on two different types of debris: the classic pyramids were formed from the material mix with stone blocks; from the material containing no stone blocks only ravines and ridges were formed. Starting point: car park in the village center.