Carrière d’Opprebais is a flooded quarry in Wallonia, Belgium, featuring deliberately placed artificial structures that function as an artificial reef. The site offers depths ranging from 5 to 27 metres, with an average depth of 10 metres, making it suitable for both beginner training and deeper dives. Divers can expect visibility between 3 and 10 metres and mild currents. The site supports night diving and includes overhead environments that require appropriate training. Shore entry is available, though divers should exercise caution regarding sharp rocks. Facilities on-site include toilets, changing rooms, a café, first aid, and air fills. Due to consistent cold water, a drysuit or thick wetsuit is recommended.

Carrière des Trois Fontaines is a sheltered, landlocked freshwater quarry in Wallonia. The site features a combination of natural rock walls and artificial reef structures placed on the bottom. Divers can explore depths ranging from 8 to 18 metres, making it suitable for beginners and those looking to build confidence. Access is via the shore, and the site experiences mild currents. Visibility typically ranges between 3 and 5 metres, so a torch is recommended to inspect the artificial structures. The site is open year-round and accommodates night diving. On-site facilities include parking, showers, changing rooms, toilets, and a café.

Rhisnes is a freshwater quarry in Wallonia, Belgium, offering a distinct combination of cave diving and artificial reef structures. The site ranges from 6 to 40 metres in depth, with an average of 26 metres. Divers should expect variable visibility between 4 and 10 metres and mild currents. Access is via the shore. Due to the overhead environment and depth, this site is suitable for intermediate divers with advanced certification. Proper buoyancy control is essential. Divers should carry primary and backup torches rated for cave use. Check locally for current access arrangements and permit requirements before planning a trip, as facilities remain unconfirmed.

Carrière de Floreffe is a freshwater quarry in Wallonia, Belgium, offering a diverse underwater circuit suitable for beginners. Divers can explore various submerged objects, including a glider, a Cessna aircraft, boats, and a cabin from the former Namur cable car. Navigation is supported by guide ropes connecting these features, while other areas require compass navigation. The site reaches depths between 4 and 20 metres, with an average of 12 metres. Entry is via the shore, and the site accommodates dives of approximately 60 minutes. Conditions include mild currents and visibility ranging from 1 to 10 metres, with a thermocline present. Facilities include parking, changing rooms, showers, a cafe, and guided tours.

De Nekker is a 30-hectare freshwater diving pond located within a larger 65-hectare recreation centre in Brussels. The site features artificial reefs and wrecks, with depths ranging from 3 to 10 metres. Divers access the water from the shore, with the main diving area situated approximately 100 metres from the beach. Visibility varies significantly between 3 and 25 metres. The site is suitable for beginners and supports night diving, with typical dives lasting around 40 minutes. Facilities available on-site include parking, toilets, showers, changing rooms, and air fills. Divers should be aware of low visibility and a thermocline during the spring months.

Carriere de Scouffleny is a flooded quarry in Belgium featuring artificial reef structures and steep quarry walls. This freshwater site reaches depths between 20 and 44 metres, with an average depth of 30 metres. Divers encounter an overhead environment that requires advanced buoyancy and navigation skills. Visibility is variable, ranging from 2 to 10 metres, and a thermocline is present. The site is suitable for intermediate divers who should carry a torch and reel. Facilities include parking, toilets, air fills, and an on-site dive shop. The habitat supports various temperate freshwater fish and invertebrates typical of the region.

Lillé is a freshwater quarry site located in the Sprimont Quarries of Belgium. This artificial reef environment offers depths ranging from 4 to 30 metres, with an average depth of 8 metres. Divers can expect visibility between 4 and 12 metres. The site is accessed via the shore and is suitable for intermediate divers. Water temperatures fluctuate between 3 and 16 degrees Celsius. Facilities available on-site include changing rooms, showers, toilets, air fills, and a dive shop. Night diving is permitted, with typical dives lasting approximately 50 minutes. Hazards at this location include entanglement risks and overhead environments.