Acacia Ridge Air Raid Shelter, World War II air raid shelter in Acacia Ridge, Brisbane, Australia

The Acacia Ridge Air Raid Shelter is a rectangular concrete bunker on a rock shelf cut into the north face of the former Archerfield Quarry. Its exposed part consists of a lower outer curtain wall with concrete props and rectangular openings at each end, and a shorter, taller inner bunker wall with no visible openings. Vegetation obscures the main bunker, and only the top of the curtain wall shows above the quarry water.

The bunker was built between 1942 and 1943 by the Allied Works Council to protect military personnel from Japanese air attacks near Archerfield aerodrome. It was part of Australia's defense preparations during World War II.

The shelter sits on a rock shelf in the north face of the former Archerfield Quarry, also called Carr's Quarry, beside Mortimer Road Park. Its outer curtain wall, buttressed with concrete props and pierced by rectangular openings at each end, once shielded two entrance tunnels about 20 feet long that turned into the main bunker.

The shelter sits in the southwest corner of the Mortimer Road Reserve, bounded by Mortimer Road and Beatty Road, near Mortimer Road Park. The quarry is flooded, so the bunker interior cannot be inspected; only the top of the outer curtain wall shows above the water, and vegetation hides the main bunker.

The 1992 drainage of the quarry let historians inspect the interior: the two entrance tunnels are 20 feet (6.1 m) long, with doorways turning into the main bunker. Remains of four-inch-thick wooden sliding doors and three one-foot-diameter ceiling holes were recorded. Water has since refilled the pit, so the inside cannot be visited.