Tunnel is a volcanic cave dive located in Puerto de la Cruz, Tenerife. The site features a 60-metre long tunnel with a diameter of 4 to 6 metres, allowing groups to navigate the passage together. Divers experience depths ranging from 12 to 25 metres, with an average depth of 15 metres. This shore entry dive is suitable for beginners and offers visibility between 10 and 30 metres. Conditions include mild currents and water temperatures ranging from 20C to 24C throughout the year. As an overhead environment, this site is also accessible for night diving, with typical dive times lasting 45 minutes.

Portillo is an advanced dive site located in Puerto de la Cruz, Tenerife. The topography consists of a reef starting at 15m depth, which descends to a surrounding sand floor. A notable feature is a volcanic cave entrance situated at 32m. Divers must access this site by boat. Conditions include moderate currents and visibility ranging from 5m to 30m. Water temperatures fluctuate between 20C and 23C throughout the year. Due to the depth and the overhead environment of the cave, this site presents risks including decompression, nitrogen narcosis, and deep diving hazards. Local facilities provide air fills, equipment rental, and guided tours.

Bollullo is a reef and cave system situated 200 metres off the coast of Puerto de la Cruz. The reef structure protrudes approximately one metre above the surface, leading down to a maximum depth of 20 metres with an average depth of 12 metres. Divers can explore various caves and swim-throughs within the site. Access is exclusively by boat. Conditions typically feature mild currents and visibility ranging from 15 to 30 metres. Water temperatures fluctuate between 20C and 24C throughout the year. Due to the presence of overhead environments and potential surge, this site is recommended for intermediate divers. Typical dive duration is 45 minutes.

Semiramis is a shore-entry dive site in Puerto de la Cruz, Tenerife, featuring a diverse topography of reefs, caves, and a large canyon with lava bridges. The site ranges in depth from 8 to 20 metres, with an average depth of 12 metres, making it suitable for beginners. Conditions are generally mild with visibility ranging from 5 to 25 metres. Water temperatures fluctuate between 20C and 24C throughout the year. Night diving is permitted at this location. Species recorded around this area include various wrasses, pufferfish, bream, and crustaceans such as crabs and hermit crabs.

Bastion is a marine dive site in Puerto de la Cruz characterised by its volcanic topography. The site features underwater structures including gateways, bridges, steep walls, and towers that resemble a castle. Divers can explore these formations at depths ranging from 12 to 25 metres. Access to this site is by boat only. Conditions are generally manageable with mild currents, making the site suitable for beginners. Water temperatures fluctuate throughout the year, ranging from 20C in the winter months to 24C in September.

Puerto de la Cruz Harbor is a reef site featuring an artificial harbor wall structure. Suitable for beginners, the site offers shore access with depths ranging from 6 to 28 metres, averaging 15 metres. Divers and snorkellers can observe a variety of marine life, including common crabs and snails. Less frequently encountered species include the Great Barracuda, Turkish Wrasse, European Parrotfish, Tompot Blenny, and Sea Hare. Eleven-armed Sea Stars, Canary Damsels, bream, hermit crabs, sea cucumbers, and rockpool prawns are also recorded. Visibility typically spans 10 to 30 metres, though divers should remain aware of boat traffic. The site supports night diving and includes nearby parking and dive shop facilities.

Valle de los Peces is a boat-access site off Puerto de la Cruz featuring a combination of reef, wall, and drop-off topography. The site reaches depths between 18 and 50 metres, with an average depth of 35 metres, making it suitable for intermediate divers. Conditions include strong currents that can shift with the tide, requiring good buoyancy control and drift awareness. Visibility typically ranges from 10 to 30 metres, and water temperatures fluctuate between 19 and 23 degrees Celsius. Divers should wear protective clothing to prevent jellyfish stings and maintain neutral buoyancy to avoid contact with the reef structure.

La Catedral is a deep dive site located off Puerto de la Cruz, featuring a combination of an open-water reef, a vertical wall, and an overhead cave environment. The site reaches depths between 30 and 45 metres, with an average depth of 35 metres. Divers encounter moderate currents, requiring strong buoyancy control and careful air management. Visibility typically ranges from 10 to 30 metres. Due to the significant depth and the presence of an overhead environment, this site is suited for intermediate divers. Access is by boat only. Divers should be aware of the deep environment and the overhead hazards present within the cave sections.