RAAF 211 Radar Station at Charlie’s Hill became operational in late 1943, and was one of five British-designed Advanced Chain Overseas (ACO) radar stations constructed in Queensland during World War II: four being completed (Benowa, Toorbul, Bones Knob and Charlie’s Hill) with a fifth not completed (Paluma). The site is located in a reserve about 1.5 km along Charlie’s Hill Road, east of the Bruce Highway, about 5km south of Home Hill. Two reinforced concrete semi-circular igloos, both about 10m long by 6m wide, are located over 50m apart at the summit of Charlies' Hill. Each has a small concrete tower at the north end.