Stalattiti Cave is a limestone cavern located at Punta del Giglio near Alghero. Formed during the ice age when sea levels were lower, the site features a distinct overhead environment where divers can ascend to a small internal lake to observe stalactites. The dive typically lasts 50 minutes at an average depth of 12 metres, with a maximum depth of 18 metres. Access is by boat only, and the site is suitable for intermediate divers. Conditions include mild currents and water temperatures ranging from 14C to 24C throughout the year. Due to the overhead environment, divers must be aware of entanglement hazards.

Fantasmi Cave in Alghero is a limestone and alabaster cave system featuring a wall and reef environment. The site is reserved for advanced divers due to the overhead environment and potential for low visibility. Depths range from 5 to 30 metres, with an average of 10 metres. Divers should be aware of a thermocline at approximately 12 metres during summer months, where temperatures drop to 13°C. Access is by boat only, and conditions typically feature mild currents. Visibility varies between 10 and 30 metres. Facilities including air fills, equipment rental, and guided tours are available in Alghero.

Cervi Cave in Alghero is a combined wall and cave dive accessible by boat. Divers follow a wall before entering the cave system, which features an underground lake. Within a small niche inside the cave, divers can observe fossilised bones of prehistoric reindeer. The site reaches depths between 8 and 22 metres, with an average depth of 12 metres. Conditions are generally mild with visibility ranging from 10 to 20 metres. Due to the overhead environment, this site is suitable for intermediate divers. Guided tours are available, and the site offers facilities including gear storage, equipment rental, and rinse stations.

Pozzo Cave in Alghero, Italy, offers a diverse underwater experience featuring a cave, reef, and wall topography. Divers typically begin at a shallow pinnacle before navigating along the wall to enter the cave. A notable feature is the exit at a depth of 2 metres, where air bubbles filtering through the limestone create a distinct visual effect. The site reaches a maximum depth of 17 metres with an average of 10 metres. Conditions are generally mild, though the overhead environment requires appropriate caution. Species recorded around this area include wrasses, Mediterranean moray, common octopus, and various nudibranchs. Boat access is required for this site, which is suitable for beginners.

Capo Galera is a shore-entry reef located in Alghero, Italy, offering a shallow profile between 5 and 12 metres. The site is well-suited for beginners, featuring mild currents and visibility ranging from 15 to 30 metres. Divers can expect a typical dive duration of 50 minutes. Water temperatures fluctuate significantly throughout the year, ranging from 14°C to 26°C, with thermoclines often present at depth. The site is equipped with comprehensive facilities including a dive shop, equipment rental, air fills, and rinse stations. Night diving is a popular activity here, providing opportunities to observe nocturnal marine life across the reef and sandy patches.

Sardegna & Tuscany Cave in Alghero offers a varied underwater profile featuring reef, cave, and canyon terrain. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 15 metres. The site requires boat access and is situated 9 kilometres from the shore. Conditions are generally manageable with mild currents and visibility between 15 and 30 metres. Due to the presence of overhead environments in the cave and canyon sections, this site is suited for intermediate divers with strong buoyancy control. Water temperatures fluctuate between 14 and 22 degrees Celsius throughout the year. Divers should be cautious of sharp coral and rock formations when navigating the narrower passages.

Bramassa is a diverse marine site located in Alghero, Italy, offering a variety of underwater topography including reefs, walls, caves, and canyons. The site is accessible by boat and is suitable for beginners, with depths ranging from 8 to 15 metres and an average depth of 12 metres. Divers can explore tunnels and windows that create distinct light effects, particularly during the afternoon. Conditions are generally mild, though divers should remain aware of boat traffic in the area. The site provides a varied environment for those interested in geological formations and coastal Mediterranean diving.

Spiaggia del Lazzaretto features a sandy main beach flanked by ten small rocky coves to the north. These shallow inlets provide accessible conditions for snorkelling, making the site suitable for beginners. Water temperatures fluctuate between 14C and 26C throughout the year, with cooler conditions common outside of the summer months. Currents are generally mild. Species recorded around this area include wrasses, which are very common during July and August, alongside less frequently encountered marine life such as Mediterranean Moray, Common Octopus, Great Barracuda, and various nudibranchs. On-site facilities include parking, showers, changing rooms, a rinse station, equipment rental, and a cafe.