Visit the Guaita tower

Second tower on Monte Titano’s highest summit, home to the ancient-arms museum.

Historic fortress and the Crown Jewels.

The "witches’ passage" walkway between the Guaita and Cesta towers.

Seat of the world’s oldest republic and its changing of the guard.

Storybook fortress on a rock island ringed by a river canyon.

Clifftop Transylvanian castle marketed as Dracula’s — worth it either way.

Renaissance castle built into the mouth of a cliff cave, with secret tunnels used by a robber knight.

Explore Carcassonne, a fortified medieval city in southern France. Walk the double ring of ramparts of the Cité de Carcassonne (a UNESCO World Heritage site with 52 towers), admire the Basilica of Saints Nazarius and Celsus (known for its 12th-century stained glass and Gothic choir), and cross the Pont Vieux (a 14th-century stone bridge offering panoramic views of the city).