Les Blockhaus du Pyla consists of submerged WWII bunkers located off the beach near the Dune du Pilat. These structures serve as artificial reefs, with walls colonised by mussels and anemones. The site is accessible via a shore entry from the Corniche beach. Due to the nature of the location and the swim required, it is suitable for advanced snorkellers. Access is restricted to high tide conditions. Water temperatures at this Atlantic Coast site vary throughout the year, ranging from 12C in the winter months to 22C in August.

Banc d'Arguin is a national nature reserve sandbank situated at the mouth of the Arcachon bay near Cap Ferret. This site is accessible exclusively by boat or water taxi from Arcachon or Cap Ferret. Snorkelling is best performed on the interior side of the bank, where the water remains calmer. Conditions vary, with water temperatures ranging from 12C in winter to 22C in August. Species recorded around this area include European Common Cuttlefish, Common Octopus, Gray Seal, Scorpionfish, Conger Eel, various wrasses, Barrel Jellyfish, Tompot Blenny, crabs, sea stars, and Striped Red Mullet. This site is suitable for intermediate snorkellers.

Le Caméléon is a wreck site located off the coast of Cap Ferret, France, serving as an artificial reef. The site sits at depths between 22 and 26 metres, with an average depth of 23 metres. Divers access the wreck by boat, as it lies approximately 19 kilometres from shore. Conditions include a moderate current and visibility consistently around 5 metres, making a torch useful for exploring the structure. Water temperatures fluctuate between 12 and 18 degrees Celsius throughout the year. Due to the depth and current, this site is suitable for intermediate divers. Species recorded around this area include European Common Cuttlefish, Common Octopus, Conger Eel, and various crabs.

Hortense is a wreck and artificial reef site located near Cap Ferret, offering depths ranging from 1 to 31 metres with an average depth of 30 metres. The site is suitable for intermediate divers and snorkellers, with both boat and shore entry options available. Conditions are characterised by strong currents, making it essential to consult tidal tables and target slack water for your dive. Water temperatures fluctuate between 12 and 18 degrees Celsius, necessitating a thick wetsuit or drysuit. Due to the depth and potential for strong currents, divers should monitor their profiles closely and remain aware of local boat traffic at the surface. Night diving is also permitted at this location.

Chez Hortense is a diverse dive site in Arcachon, France, featuring a combination of a wall, an artificial reef, and a wreck. The site offers depths ranging from 10 to 30 metres and requires boat access. Divers navigate variable currents and visibility typically between 4 and 10 metres. The topography includes large rock formations and submerged structures. Species recorded around this area include European Common Cuttlefish, Common Octopus, Marbled Electric Ray, Gray Seal, wrasses, Conger Eel, scorpionfish, crabs, Barrel Jellyfish, Tompot Blenny, Common Sea Star, Spiny Spider Crab, and brittle stars. Water temperatures fluctuate between 12C and 18C throughout the year. Hazards include boat traffic, strong currents, and entanglement risks.

Les Blockhaus at Cap Ferret consists of submerged wartime concrete structures that now function as an artificial reef. This site is suitable for intermediate divers, with depths ranging from 6 to 20 metres and an average depth of 17 metres. Divers may encounter moderate currents, requiring careful planning around slack water. Visibility typically spans 5 to 10 metres. Entry can be made by boat or from the shore, though shore entries require caution due to unpredictable surf and shore breaks. Water temperatures fluctuate between 12 and 18 degrees Celsius throughout the year, necessitating appropriate thermal protection. Night diving is permitted at this location.

Le Mimbeau is a protected lagoon-like inlet situated behind a natural sand spit at Cap Ferret in Arcachon, France. This shore-entry site is suitable for beginners, offering a sheltered environment for snorkelling among the moorings. Water temperatures range from 12C in winter to 22C in August, and visibility can reach up to 10 metres. While the site is generally calm, snorkelers should be aware of the potential for strong currents in the area. Facilities including parking and a cafe are available nearby for visitors.

Hortense is a multi-faceted site in Arcachon, France, featuring artificial riprap, sunken debris, and a drop-off. Located 300 metres from the shore, the site reaches depths between 4 and 25 metres. Entry is via an old boat slipway near the local restaurant. Conditions vary, with moderate currents, potential rip currents, and surf, making it suitable for intermediate divers. Snorkellers can explore the shallower rocky areas, particularly during slack tide. Species recorded around this area include European Common Cuttlefish, Common Octopus, Marbled Electric Ray, Gray Seal, various wrasses, scorpionfish, Conger Eel, crabs, Tompot Blenny, Barrel Jellyfish, Spiny Spider Crab, brittle stars, and sea stars.