Other sites include the historical Cathar castles (Montsegur, Peyrepertuse, Lastours) numerous abbeys (Lagrasse, Fontfroide, St. Hilaire and St. Papoul) and many market towns.

The Cité of Carcassonne
The old city (12th-13th centuries) has double perimeter walls and 52 towers. St Nazaire basilica is built in Romanesque and gothic styles. On the left bank of the Aude river, the Lower Town (13th century) is worth a visit. Fireworks 14 July. Tournaments (Medieval Pageantry) from 3 July to 29 August.

Canal du Midi
Undertaken by Pierre-Paul Riquet in the 17th century to link the Atlantic to the Mediterranean, it crosses the Aude from West to East over a distance of more than 100 kms. House boating holidays is popular from the main towns on the Canal: Castelnaudary, Bram, Carcassonne, Trèbes, Homps, Le Somail, Argens-Minervois, Ginestas, Narbonne. Passenger boat: 1 hour, 2 hours, half day on the Canal departing from Castelnaudary, Bram, Carcassonne, Trèbes, Homps, Le Somail, Narbonne. You can also hire bikes along the canal. 

Narbonne
Roman horreum or warehouse: Vast underground storerooms of perishable goods. The Horreum is the only surviving Roman remains in Narbonne open to the public (built 1st cent. BC) Archibishop's Palace : Museum of Art and History and Archeological Museum. Museums occupying the former Archibishop's Palace built in the 12th - 14th centuries. The collections are made up of finds recovered from digs in the Aude département.

Fontfroide Abbey
Founded at the end of the 11th century by the Benedictines, it immediately became very prosperous. Affiliated to the Cistercian order in 1145, it was a bastion of religious orthodoxy during the period of the crusade against the Albigensian heretics.

Visit the official sites of 

l'Office de Tourisme, Carcassonne

Aude Pays Cathare

Also

Carcassonne Golf Club