Hermitage of St Nicholas in Sonnino: trekking among rock spires and marine fossils
Hidden among the valleys of the Ausoni Mountains, not far from Sonnino, an almost lunar rocky landscape hosts the Calanche di Sonnino, limestone pinnacles shaped by time. It is here that the ruins of the Hermitage of San Nicola in Sonnino can be found. A place where geology and history meet, reachable only on foot along a fascinating trail.
Traces of monks and marine fossils
The hermitage dates back to around the year 1000. The monks built it among these “spires”. It was under the control of the monastery of Santa Maria delle Canne and, further up, the Abbey of Fossanova. Today, the apse and some load-bearing walls remain. But the real surprise lies in the rocks themselves — if you look closely you might spot the fossilised shells of rudists, marine organisms that were here around 80 million years ago.
The stone cathedral
These rock formations, up to 10 metres tall, are the result of two million years of karst erosion. Water carved the limestone, creating a labyrinth of stone. The site is an open-air laboratory. The Speleoclub Roma is still exploring and cataloguing the caves and the sinkholes that open up in the area.
The hermitage and ravine area can be reached via trekking trails. Since conditions may vary, it is advisable to plan your visit carefully. For detailed and up-to-date information on access routes, we recommend contacting the Municipality of Sonnino.