Insular Italy
Sardinia is the second largest Mediterranean island with an area of . To the east is the Tyrrhenian Sea that separates the island from mainland Italy, and to the north is the Strait of Bonifacio that separates Sardinia from the French island of Corsica. Its highest point is Punta La Marmora () with an altitude of . The longest river of the island is the Tirso river,  long.