Lastours is a commune in the Aude department in southern France.
Lastours is located 12 km outside Carcassonne, in the valley of the Orbiel. There are four small castles each built on a large 300 m high rocky ridge. The castles were built to control the access to Montagne Noire and the Cabardes region. These are some of the few original Cathar castles left.
Coordinates 43°20'2.484" N 2°22'50.232" E