Its port stands before the enchanting San Pietro Island and connects Sardinia to Carloforte, one of the major tourist resort islands. Portoscuso, populated by over 5,000 inhabitants, was founded in the late-16th century during Spanish domination, as a village based on fishing and coral miners hailing from Sardinia and also Sicily, Ponza, Marseille and Majorca. From the village of Puerto Escuso (‘hidden port’) grew an important commercial port, protected by a 16th-century tower in tuff and trachyte. Rising up on a hill, it offers wonderful views spanning from Cala della Ghinghetta to Portopaleddu (or Porto Paglietto), two beautiful coastal attractions with clear seas and fine sand. Next to the tower rising up in the mid-17th century is the Tonnara di Su Pranu.