This is a protected naturalistic area, characterized by Calanchi: deep furrows in the ground, shaped like “knife blades,” formed by clays and sands dating back to the Pliocene! They are a form of majestic and scenic erosion, typical of this territory.
The Calanchi are composed of sands and clays from the Pliocene epoch (4 million years ago). In this environment, they have been eroded by weather, creating an intricate system of deep ravines and narrow ridges, giving rise to this breathtaking landscape that stretches up to the outskirts of Chiusure.
Climbing to the panoramic terrace in Chiusure is an experience that unites the majesty of nature with human resilience. From here, one can admire the imposing Calanchi, symbols of the elements' power yet also of human fragility. Despite the fall of the medieval castle in the 15th century, the residents rebuilt the village with determination, demonstrating their indomitable spirit. This terrace embodies this eternal dialogue between nature and humanity.
In September 1462, Pope Pius II visited the Abbey of Monte Oliveto Maggiore and was awestruck by the wild grandeur of these geological formations. He wrote: “…If you ask what shape the hill on which Monte Oliveto Maggiore Abbey stands, observe the leaf of a chestnut tree. Ruinous steep cliffs and deep chasms (whose sight invokes fear and horror) block access from every side, save for a narrow strip of land, at the entrance of which stands a solid tower for defense…”
Straying from the paths and attempting new routes on the Calanchi is not only discouraged—it is extremely dangerous. The Calanchi walls are unstable; the material crumbles easily, and the slopes are steep, reaching up to perpendicular angles.
So, let’s admire this Geosite from the panoramic viewpoints scattered across the area!