A beautiful village located at an altitude of 280 m, facing Rennes-le-Château, known for its castle, whose ruins attest to a terrible siege during the Cathar epic. But Coustaussa is also at the heart of an enigma worthy of a detective novel, the mysterious death of Abbé Antoine Gélis, one of the three mysterious parish priests of the Haut-Razès at the end of the 19th century.