Holmes Reef is a remote offshore site in the Coral Sea, located 200 kilometres from the coast. This complex reef system features walls, pinnacles, and caves, with depths ranging from 4 to 35 metres. Due to its exposed location, the site is accessible only by boat charter and is suited for advanced divers. Visibility is high, typically between 15 and 50 metres. Currents are generally moderate but can be strong, facilitating drift dives. The habitat supports a variety of reef fish and invertebrates. Divers should be aware of hazards including deep water, strong currents, and sharks. The open ocean crossing can be rough, making seasickness medication advisable.

Golden Wall at Holmes Reef is a vertical drop-off and pinnacle system located in the open ocean. This advanced drift dive reaches depths between 12 and 40 metres, with an average depth of 30 metres. The site is characterised by strong currents and significant depth, requiring precise buoyancy control and careful depth management. Visibility typically ranges from 30 to 40 metres. Due to its remote location 350 kilometres from shore, access is exclusively via liveaboard vessel. The site features gorgonian fans and soft corals that thrive in the nutrient-rich currents. Divers should be aware of potential strong swells and currents, as well as the presence of sharks.