ALG-364, Dark Eyes Arch, North Idou Area Outskirts. Largest opening has 6 meter span (estimated). From ALG-363 (Black Hole Arch), continue east straight ahead 500 meters to a flat area. This double arch is located on the other side of the flat and is visible en route due to its high position. Photo taken at sunset with the author inside the largest "eye" for scale. An easy route can be found to the "eyes" but you have to search a bit.