Porto Santo Stefano, Italy
Just off the coast of Tuscany, Monte Argentario rises from the sea. On the slopes of the mountain stands Port Santo Stefano, a town under constant siege by pirates until the 16th century when the Spanish fortified the seaport. The imposing Spanish fortress still dominates the harbor, and a walk along the citadel's walls and staircases reveals a fascinating history as well as splendid views. For a more leisurely pursuit, take the ferry to nearby Giglio Island and relax on one of the quiet beaches lapped by crystal clear waters.