The four Chateaux de Lastours. Cabaret, Tour Regine, Surdespine and Quertinheux all four built on the same rocky promontory, together controlled access into the Carbardes from the 11th century up to the French revolution 1789.

The Chateau de Villerouge-Termenes. Owned by the Archbishop of Narbonne, it became the property of Simon de Montfort when the castle at Termes surrendered in 1210.

The Chateau d'Aguilar. The ruins of the castle , standing on top of a rocky summit, consist of a high polygonal perimeter wall that narrows to a point on  the vulnerable approach.

The Chateau d'Arques. The chateau is believed to date from the latter part of the 13th century, as the region immediately surrounding Arques has sheltered Cathar perfecti since the end of the 12th century.

The Chateau de Peyrepertuse. Forming the largest ensemble of fortifications of its type in the Languedoc region, it also offers the finest example of medieval military architecture in the region.

The Chateau de Puilaurens. Consists of a keep, modified and enlarged in the 11th and 12th centuries, within a walled enclosure on top of a rocky spur that blocks off the valley.

The Chateau de Queribus. This 13th - 14th century castle was the last stronghold to succumb to the crusaders (1255), it was converted by the central monarchy into a royal fortress to stand guard over the Spanish marches until 1659.

The Chateau de Termes. In the 13th century, this castle was a Cathar stronghold, resisting siege during the Albigensian Crusade for four months.

The Chateau de Saissac. Castle of medieval origin, with vast quadrangular defensive wall dominated by the remains of a polygonal dungeon.

The Cite of Fanjeaux. Standing at 360 meters altitude, this historic village offers a panoramic view over 7 French departments. In the 14th century it grew into a medieval stronghold with a population of 3000.