7Carcassonne, France
Step back in time to the medieval era with a visit to Carcassonne, a fortified city in the south of France dating back to the 5th century. Surrounded by double walls and 52 towers, the citadel of Carcassonne is a UNESCO World Heritage site and one of Europe’s best-preserved medieval fortresses. Wander through the narrow streets of the old town, admire the Basilica of Saint-Nazaire, and soak up the medieval ambiance of this historic gem.