The Phoenix Barge, also known as the Lost Barge, is an artificial reef and wreck site located in Spain. The vessel earned its nickname after a storm shifted its position, leaving it slightly damaged but intact. This site is suitable for intermediate divers, with depths reaching down to 23 metres. Access to the site is by boat only, as it is situated approximately 11 kilometres from the shore. Due to the depth and the presence of boat traffic, divers should exercise caution during their visit. There is no information available regarding the water temperature or marine life at this location.

The Army Tank reef on the Northwest Coast of Ireland is an artificial reef site formed by submerged M60 army tanks. This site is strictly for advanced divers due to the presence of strong currents and the depth, which averages 14 metres. Access to the site is by boat only. Divers can expect visibility ranging between 20 and 30 metres. Water temperatures remain consistently low throughout the year at approximately -2C. Given the environmental conditions and the nature of the site, it is recommended for experienced divers comfortable with current and deep-water navigation.

June Jones Reef is a marine dive site in Portugal featuring the remains of a 50ft steel boat. The vessel has been significantly impacted by storms, resulting in a widely dispersed debris field across the seabed. Divers can explore these scattered mounds of wreckage, which contain various structural elements. Due to the nature of the site, careful navigation is required to locate the dispersed sections. Water temperatures at this location are consistently cold, recorded at approximately -2C throughout the year. This site is suited for divers comfortable with wreck exploration in challenging, low-temperature conditions.

Bay Cones is an artificial reef site in Portugal consisting of eight resin cones placed on the seabed. The site reaches a maximum depth of approximately 8 metres, with an average depth of 8 metres. Due to the location, access is by boat only. The site is suitable for beginner divers who can explore the individual characteristics of each cone. Conditions at this site vary, and water temperatures remain consistently low throughout the year.

Butler Barge is a 200-foot vessel intentionally sunk to function as an artificial reef. The wreck rests at a depth of 78 feet. Divers can access the site via both shore and boat entries. Due to the extreme water temperatures, which remain consistently around -2C throughout the year, this site requires specialised thermal protection and experience in cold-water diving environments. The structure of the barge provides a distinct underwater topography for exploration, though divers should be prepared for the challenging thermal conditions present at this location.

Tug Boat Janet is an artificial reef located 24 kilometres offshore from Panama City Beach. This wreck sits at depths between 20 and 30 metres, requiring boat access and intermediate diving skills. Divers encounter mild currents and visibility ranging from 10 to 30 metres. A sharp thermocline is often present, causing significant temperature drops below the surface layer. Hazards include entanglement risks within the wreck structure, deep water, and the presence of lionfish. Species recorded around this area include drum, croaker, slippery dick, crabs, bream, hermit crabs, sea hares, bluebottles, snails, and mullet. Divers should monitor depth gauges closely and prepare for variable conditions.

The Underwater Museum of Art is an artificial reef located 1496 metres offshore from Panama City Beach. This site features a collection of sculptures placed on the seabed at a consistent depth of 18 metres. Divers access the site exclusively by boat, with typical dives lasting around 45 minutes. Conditions are generally suitable for beginners, though visibility can fluctuate between 3 and 18 metres. Divers should remain aware of boat traffic and the presence of jellyfish in the area. Water temperatures range from 17C in February to 28C in August, providing a varied environment for exploring these submerged structures.

Sea Turtle Reef is an artificial reef structure shaped like a sea turtle, located 238 metres offshore. The site consists of 58 individual reef modules situated at an average depth of 5 metres, with a range of 4 to 6 metres. Two yellow poles on the beach assist snorkelers in aligning their swim to the reef. Conditions include mild currents and visibility ranging from 5 to 15 metres. Species recorded around this area include blue button, drum, croaker, crab, hermit crab, bluebottle, sea hare, snail, and sea cucumber. Hazards at this marine site include jellyfish, sharks, and surf. Facilities available at the shore entry point include parking, toilets, and showers.