La Catedral is a distinctive hollow mountain formation located two miles off the coast of Cartagena. The site features a dome-shaped interior cavern, which gives the location its name. Divers can explore the structure at a depth of 32 metres, where multiple exits from the cave offer varying views of the surrounding blue water. The interior of the dome provides a unique environment for underwater navigation. Due to the depth and the nature of the cavernous topography, this site is suited for experienced divers. Water temperatures at the site fluctuate throughout the year, ranging from 15C in the winter months to 27C during August.

Barcoquemao is a 12-metre pleasure boat wreck resting on a sand bed at a maximum depth of 37 metres. The vessel sank following a fire and is now an isolated structure suitable for advanced divers. Conditions at the site are variable, with visibility ranging from 10 to 30 metres and water temperatures between 14C and 18C. Due to the depth, divers must manage decompression and nitrogen narcosis risks. Access is by boat only, with typical dives lasting around 30 minutes. Species recorded around this area include wrasses, bream, scorpionfish, great barracuda, and various crustaceans such as hermit crabs and abalone.

El Calón in Cartagena is a shallow reef and seagrass site ideal for beginner snorkelers. The area features natural rock pools and extensive seagrass meadows that serve as a nursery for marine life. Depths typically range from 1 to 10 metres, with an average of 7 metres. Conditions are generally calm with mild currents, though visitors should be aware of sea urchins in the area. Access is via the shore, and the site offers convenient facilities including parking, showers, and a nearby cafe. Species recorded around this area include wrasses, bream, scorpionfish, various crabs, abalone, and blennies.

La Catedral is a boat-access site featuring a complex reef, wall, and cave system. Located near Aguilas and Calabardina, the site reaches depths between 20 and 40 metres, with an average depth of 25 metres. Divers must be prepared for strong currents, which dictate dive planning and route navigation. Visibility typically ranges from 5 to 10 metres. Due to the significant depth, potential for strong currents, and overhead boat traffic, this site is suited for intermediate divers. A surface marker buoy is essential for all ascents to manage risks from passing vessels. Water temperatures remain cool, ranging from 14 to 17 degrees Celsius throughout the year.

El Calon is a shallow shore dive located 50 metres from the coast near Cartagena, Spain. The site features a combination of reef sections and a cave, with depths ranging between 2 and 4 metres. It is suitable for beginner divers, though the shore entry requires caution due to surf and shore break conditions. Divers should remain alert to variable currents throughout the area. Water temperatures fluctuate between 15C in winter and 27C in summer. Facilities including showers and a cafe are available on site to assist with post-dive comfort. Species recorded around this area include wrasses, bream, scorpionfish, and various crustaceans.

El Pecio is a shallow dive site located off Cartagena, Spain, with depths ranging from 3 to 4 metres. This site is suitable for beginners looking to build confidence in a low-pressure environment. Access is by boat, and the area typically experiences mild currents. Visibility is variable, ranging from 10 to 30 metres. Water temperatures fluctuate significantly throughout the year, from 15C in winter to 27C in summer, requiring seasonal adjustments to wetsuit thickness. Species recorded around this area include wrasses, Turkish wrasse, scorpionfish, bream, crabs, peacock blenny, abalone, flat crab, white seabream, painted comber, hermit crab, snails, and salema porgy.

Cala del Peñón Cortado is a narrow cove situated between high cliffs north of Villaricos. The site is defined by the Peñón Cortado, or Cut Rock, which forms a sheltered environment featuring extensive Posidonia beds. Access is via the shore, and the site is suited for intermediate snorkellers. Water temperatures fluctuate throughout the year, ranging from 15C in winter to 27C in August. Species recorded around this area include wrasses, Turkish wrasse, scorpionfish, bream, painted comber, white seabream, and various crustaceans such as crabs, hermit crabs, and flat crabs. Snails and abalone are also present in the vicinity.

Cabeza del Caballito in Cartagena, Spain, is a diverse dive site featuring a combination of cave, pinnacle, and reef topography. Known locally as the Head of the Horse, the site serves as the North Gate entrance to the Cathedral. Divers can explore depths ranging from 3 to 30 metres, with an average depth of 18 metres. Access is by boat only, located 4000 metres from the shore. Conditions include mild currents and visibility between 10 and 30 metres. Due to the presence of an overhead environment, deep sections, and potential for current, this site is suited for intermediate divers. Typical dive times are approximately 45 minutes.