The Best Sight in Northern Portugal, Portugal

Within the walls of the Cidadela, you'll find the Castelo and the Domus Municipalis (Latin for "Municipal House"), a rare Romanesque civic building dating to the 12th century; it is always open. The nearby Igreja de Santa Maria, a church with Romanesque origins, has a superb 18th-century painted ceiling. A prehistoric granite boar, with a tall medieval stone pillory sprouting from its back, stands below the castle keep, or Torre de Menagem, which now houses the Museu Militar (€3). The latter displays armaments from the 12th century through World War I, but the structure itself is the main attraction, with its 108-foot-high Gothic tower, dungeons, drawbridge, turrets, battlements, and vertiginous outside staircase.