iStock International
From early prehistoric settlements to medieval fortresses, Italy's archeology is an apparently inexhaustible source of wonder, with treasures spanning several millennia and dozens of cultures. Etruscan, Roman, and Greek towns, cities, and necropolises yield the richest treasure troves, but little known … more civilizations like the Nuragic people in Sardinia are no less intriguing. Needless to say, Pompeii and Hercolaneum are in a realm of their own, with life frozen (well, burnt, really!) in real time by the sudden eruption of the nearby Vesuvius.