Carcassonne, a hilltop town in southern France’s Languedoc area, is famous for its medieval citadel, La Cité, with numerous watchtowers and double-walled fortifications. The first walls were built in Gallo-Roman times, with major additions made in the 13th and 14th centuries. Château Comtal, a 12th-century castle within the Cité, offers archaeological exhibits and a tour of the inner ramparts.