ALG-377. Triple Arch is located on the maze of North Idou site on the huge Tassili National Park, wilaya of Illizi, Algeria. The main opening has a span of 7.0 meters and an estimated height of 8.0 meters. The author is silhouetted on the edge of a promontory behind the span making this arch appear larger than in reallity. Nevertheless, it is very picturesque.