Isla del Fraile is a boat-access site in Cartagena, Spain, featuring a combination of reef and wall topography. The site offers depths ranging from 3 to 30 metres, making it suitable for intermediate divers. While the baseline current is mild, divers should be aware of potential strong surges around the island's exposed faces. Visibility can be variable, so monitoring conditions before descent is essential. Water temperatures fluctuate between 15 and 19 degrees Celsius throughout the year, necessitating a 3 to 5mm wetsuit. Guided tours are available for those exploring this underwater structure.

La Cresta is a reef and wall site in Cartagena, Spain, accessible only by boat. The topography ranges from 8 to 18 metres, with an average depth of 13 metres. Divers encounter mild currents, making it suitable for beginners, though careful monitoring of depth gauges is required. The site features cave structures; these should not be entered without specific overhead environment training. A guided tour is recommended to navigate the wall and reef effectively. Species recorded around this area include Mediterranean moray, common octopus, European common cuttlefish, great barracuda, various wrasses, scorpionfish, kingfish, rock cod, Cratena slug, Turkish wrasse, fried egg jellyfish, stargazer, conger eel, and flatworm.

Embarcadero del Hornillo in Cartagena, Spain, offers a unique snorkelling experience around the base of a historic 1903 mineral loading dock. The site consists of iron and concrete structures that now function as an artificial reef within a sheltered bay. Entry is via the shore, making it suitable for beginners. Water temperatures fluctuate throughout the year, ranging from 15C in winter to 27C in August. Species recorded around this area include Mediterranean Moray, Common Octopus, European Common Cuttlefish, Great Barracuda, wrasses, scorpionfish, rock cod, Cratena slug, kingfish, Fried Egg Jellyfish, stargazer, Turkish wrasse, groupers, and conger eel.

El Castillo in Cartagena, Spain, features a combination of natural reef and artificial structures. This site is suitable for beginners, with depths ranging from 3 to 24 metres and an average depth of 15 metres. Divers access the site by boat. Conditions are generally calm with mild currents, though surge can be a factor. The site is well-suited for night diving. Facilities available at the location include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, and boat charter services. Guided tours are also provided for those exploring the area.

Los Covachos is an advanced open sea dive site located in Cartagena, Spain. The topography is diverse, featuring a combination of walls, pinnacles, and the remains of several fishing boats intentionally sunk in the early 2000s. Divers can expect depths reaching 40 metres. Due to the exposed nature of the site, boat access is required. Conditions are characterised by strong currents, which may necessitate performing safety stops while drifting in the blue. Water temperatures range from 14C to 17C throughout the year. This site is suited for experienced divers comfortable with deep water and current management.

Los Meros is a boat-access dive site located off the coast near Aguilas and Calabardina. The topography features a combination of reef and wall structures that descend to depths of 30 to 35 metres. Due to the significant depth, this site is suited for intermediate divers with appropriate deep diving training. Visibility at the site ranges from 10 to 30 metres, and currents are typically mild. Water temperatures fluctuate between 14 and 18 degrees Celsius throughout the year, necessitating appropriate thermal protection. Divers should monitor their computers closely to manage bottom time and no-decompression limits during the typical 35-minute dive.

Playa del Pino is a shore-entry reef site located between Aguilas and Calabardina. The topography consists of a mix of sand and rocks, creating a sheltered environment suitable for beginners. Depths range from 1 to 7 metres, with an average of 4 metres. Conditions vary, with visibility between 1 and 10 metres and mild currents. Species recorded around this area include Mediterranean Moray, Common Octopus, Great Barracuda, European Common Cuttlefish, various wrasses, Scorpionfish, Stargazer, Fried Egg Jellyfish, Rock Cod, Turkish Wrasse, Conger Eel, Cratena Slug, Kingfish, and Groupers. Parking is available at the site. Typical dives last approximately 45 minutes, and the site is rated 3 out of 5 for snorkelling.

El Tubo is an artificial reef and wreck site located in Cartagena, Spain. This site features a small underwater structure that reaches a maximum depth of 16 metres. It is suitable for beginner divers and is accessed exclusively by boat. Divers should be aware of boat traffic in the area. Conditions are generally mild, with water temperatures ranging from 15C in the winter months to 25C in August. The site offers a varied underwater topography suitable for those interested in exploring artificial structures and wreck remnants.