Cuevas in Cartagena, Spain, offers a diverse underwater landscape defined by vertical walls and numerous caves and grottos. Suitable for beginners, the site features depths ranging from 12 to 23 metres. Divers access the site from the shore, encountering mild currents and visibility between 10 and 30 metres. Water temperatures fluctuate between 15C and 21C throughout the year, with potential for thermoclines or mixed fresh and saltwater within the cave systems. Hazards at this site include entanglement risks, overhead environments, and low visibility. The topography is composed of Triassic-age phyllite rock formations, characteristic of the Cabo Tiñoso coastal cliffs.

El Arco is a wall dive located near Cabo Tiñoso, featuring a distinctive stone arch formation. The site consists of a rocky massif extending perpendicularly from the cliff into the sea. Divers typically explore depths between 15 and 25 metres, though the arch itself sits in shallower water between 5 and 8 metres. Access is by boat, and the site is suitable for beginners. Conditions include mild currents and visibility ranging from 5 to 10 metres. Species recorded around this area include Mediterranean moray, common octopus, wrasses, bream, and sea stars, alongside various other Mediterranean marine life.

Cueva del Lago is a marine cave system located in Cartagena, Spain. This site is accessible only by boat and features depths ranging from 3 to 12 metres, with an average depth of 7 metres. As an overhead environment, it requires strict buoyancy control and the use of primary and backup torches. Conditions include mild currents and water temperatures fluctuating between 15C and 26C throughout the year. While suitable for beginner divers, the cave structure necessitates close adherence to guide instructions. Species recorded around this area include Mediterranean moray, common octopus, wrasses, bream, and various scorpionfish, though these are not confirmed sightings at this specific location.

El Muellecico in Cartagena is a wall and reef dive site named for a rock formation resembling a small pier. The topography features a rocky slope that descends vertically from 7 metres down to 30 metres, meeting sandy seabeds. The site consists of steep rock faces interspersed with gentle slopes of rubble and loose boulders detached from the cliff. Due to the depth and terrain, this site is suited for intermediate divers. Access is exclusively by boat. Divers should be aware of the depth and sharp coral formations present at the site. Conditions are generally characterised by mild currents, with water temperatures ranging between 15C and 19C throughout the year.

Tajo Colorao is a wall dive located along the cliffs of Cabo Tiñoso, west of Cala Cerrada. The site is named for the distinctive reddish tones of the rock face. Divers access the wall via a boat mooring located a short distance from the cliff. The dive typically lasts 40 minutes at depths ranging from 14 to 30 metres, with an average depth of 20 metres. Conditions are generally mild, with visibility between 10 and 15 metres. This site is suitable for beginners, though divers should be aware of the overhead environment presented by the wall structure.

Cueva de la Virgen is a cave and wall dive site in Cartagena, Spain, accessible only by boat. The site features a rock cavity with an entrance at 15 metres, leading to a vault open to the surface that admits natural light. Divers can observe stalactites and stalagmites within the cave structure. A freshwater spring flows from the cave, creating a halocline effect. The surrounding area includes wall topography and sandy sections. Depths at the site range from 5 to 16 metres, with visibility varying between 1 and 30 metres. Due to the cave environment and depth, this site is suitable for advanced divers.

Cala Abierta is a marine dive site located between La Azohia and Cabo Tinoso in Cartagena. The topography features a mixed bottom of rock, sand, and gravel, alongside an extensive meadow of Posidonia oceanica. Divers can explore a wall and reef structure ranging from 6 to 30 metres in depth, with an average depth of 22 metres. The site is accessible by both boat and shore, with mild currents and visibility consistently around 15 metres. Suitable for beginners, this site offers a typical dive duration of 64 minutes. Water temperatures fluctuate between 15C and 19C throughout the year. Divers should be aware of potential hazards including entanglement and sharp coral.

Cala Cerrada is a sheltered dive site located near Cartagena, Spain, accessible by boat. The site features a combination of wall and wreck topography, with depths ranging from 8 to 12 metres. Due to the protection provided by surrounding cliffs, the area offers calm water conditions suitable for beginners and training activities. Visibility at the site typically ranges between 5 and 10 metres. Species recorded around this area include Mediterranean moray, common octopus, wrasses, bream, and various scorpionfish. Divers should remain aware of boat traffic in the vicinity.