Stones like these, with round or oval hollows measuring from 1 – 30 cm are not only found in the Alps but also in Australia and South Africa. Were they made by man? For what purpose? The 11 km round trip to the "Pierres à cupules" goes from Evolène via Villa, Mayen de Cotter and Volovron back to Evolène. It takes about five hours. It climbs 800 m and then goes down again.