ALG-345, Hide and Seek Arch, Tissoukai Area Islet Five. 5.0 meter span (measured), 6 meter height (estimated). GPS 32R 552426 2756344. Find this arch on top of an esplanade between two parallel corridors using GPS. This arch is VERY hard to find due to his high position. It is not visible from the corridor floor but once located it is easy to get to.