Le Château du Diable (Devil Castle) is located on the cliff above L'Arche d'Alliance on the lower section of Vallon du Destel in Var department of France. It is a complex structure with at least seven openings, the largest of which is 7.5 meters of span. IGN topographic map Top 25 issue 3346 west Toulon (pleat B4). Château du Diable is named on the map but not located.