ALG-377, Triple Arch (main opening), North Idou Maze Area. 7.0 meter span (measured), 8 meter height (estimated) . GPS 32R 550579 2751517. From the "chamber" continue straight ahead 80 meters to the Triple Arch. The author is silhouetted on the edge of a promontory behind the span, making this arch appear larger than in reality. Nevertheless, it is very picturesque.