In Valli di Lanzo, and more precisely in Vonzo, a small hamlet in the municipality of Chialamberto, you can meet the "Casteu d'Le Rive".
There are particular phenomena of erosion that present a "body" of land surmounted by a rocky "hat"; they are called so because they look like castles rising in the sky.
These boulders, true natural sculptures of various sizes, have been shaped over the millennia and are the result of the slow action of wind and water, but also of the composition of the ground. In fact, the upper boulder that forms the hat is made of compact rock and resists atmospheric agents repairing the underlying soil from being washed out.