Also known as Double Arch Cave or Ronald McDonald Cave, is located on the northern side of a small gully above the main cliff line, 160m south, near the end of Fire Trail No. 7, which in turn is off Glowworm Tunnel Road. It was accidentally discovered on 20th March 2013 by a bushwalker who misinterpreted information received from rock climber Karen Coghill. He gave it the descriptive name Twin Arch Cave due to a natural arch dividing this overhang in two.