The Island of San Pietro is for extension, 51 sq km, the second largest island of the archipelago sulcitano. Its coasts are high and rocky bathed by a clear sea, while the interior is covered by a thick Mediterranean maquis, the Aleppo pine, the rosemary, the palmetto. In its cliffs nest the "gabbiano corso" and the Eleonora's Falcon.
The island is of volcanic origin and is famous from a geological point of view because the rocks known as commenditi named from a particular area of the island where they were studied and classified for the first time.
Carloforte is the only town on the island. It was founded during the reign of Carlo Emanuele III, by a colony of Ligurian fishermen from Tabarka, an island near the coast of Tunisia. The Ligurian origin of its inhabitants can be seen in dialect, traditions, customs and traditions, in the urbanism of the country, as you can see visiting its historical centre.
The island of San Pietro can be reached by ferry, about 30-40 minutes, from Calasetta or Portoscuso.