Rivemar Playa in Cartagena, Spain, offers a shore-entry dive across reef and seagrass habitats. Ranging from 5 to 15 metres in depth, the site features mild currents, making it suitable for beginners. The seagrass beds consist of Posidonia, which provides a habitat for various Mediterranean marine life. Divers should exercise caution during shore entry over rock and reef, as sharp coral and rocks are present; thick-soled boots are recommended. Facilities on-site include air fills, changing rooms, showers, and guided tours. Water temperatures fluctuate between 15C and 25C throughout the year, necessitating appropriate thermal protection depending on the season. Visibility at this site is variable.

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.

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 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.

El Tajo is a wall dive located 1000 metres off the coast of Cartagena, Spain. The site features a wall dropping from 14 to 30 metres, with an average depth of 20 metres. Access is by boat only. While conditions are generally mild, currents can become strong, requiring careful monitoring of depth and proximity to the boat exit point. Divers should plan to work into the current at the start of the dive. Visibility typically ranges between 10 and 25 metres, and water temperatures fluctuate between 15 and 19 degrees Celsius throughout the year. The site is suitable for beginners, though caution regarding current changes is advised.

Punta De Las Animas is a marine dive site located 1500 metres off the coast of Cartagena, Spain. The site features a rocky wall that drops to depths between 6 and 30 metres, with an average depth of 20 metres. The topography is characterised by steep, near-vertical walls and numerous caves. Access to this site is by boat only. Divers should be aware that the site is deep, and conditions typically involve mild currents. With a water temperature range of 15 to 19 degrees Celsius, this site is suited for intermediate divers looking to explore varied underwater rock formations and cave structures.

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.