The Rittner Earth pyramids in South Tyrol
What are the Rittner Earth pyramids?
When dry, this moraine clay is as hard as stone; dampened it forms a porridge-like substance which begins to slip and flow downhill. In this way, over a period of time, the saturated earth slides down into the stream below and is washed away. This constant and continuous slippage is temporarily halted only when this erosion encounters a forest where the underlying ground is so dry that it is rock hard, which hinders further rapid slippage. This is how those steep cliffs, up to 10 to 15 metres in height and a pre-condition for the formation of the earth pyramids, are made. Wherever the moraine contains larger stones which keep the earth underneath dry and hard, earth pyramids are formed by literally being "washed", or more precisely eroded, out of these cliffs. The higher the cliff and the higher up a suitable stone is found, the taller and mightier the resulting pyramid becomes.
On the Ritten you‘ll find several earth pyramids, whereby those in the "Katzenbachtal" below Oberbozen and particularly in the "Finsterbachtal", between Lengmoos and Mittelberg, which are most well-known. Further one finds still earth pyramids in the proximity of Unterinn.
In 2013 the way to the earth pyramids in the "Finsterbachtal" was renewed so that you can see even better the pyramids.