Sa Mesa Longa, known as the Long Table, is a distinctive natural sandstone reef in Sardegna, Italy. The reef acts as a barrier, forming a calm, shallow lagoon that is well-suited for snorkeling. Divers and snorkellers can access the site from the shore, with depths ranging from 2 to 8 metres and an average depth of 5 metres. Visibility varies between 8 and 20 metres, and currents are generally mild. The site is suitable for intermediate snorkellers. Facilities available at the location include parking, toilets, and a cafe. Be aware of sea urchins when entering the water.

Su Pallosu in Sardegna, Italy, is a shore-access site featuring shallow natural pools and rocky sections. The area is suitable for beginners, with mild currents and water temperatures ranging from 14C in February to 26C in August. The site is well-regarded for snorkelling, offering calm, shallow conditions that allow for easy exploration of the rocky terrain. Parking is available for visitors. While the site is known for its resident cat colony on land, the underwater environment consists of shallow rocky formations. Divers and snorkellers should be prepared for variable water temperatures throughout the year.

Mari Ermi is a reef site located in Sardegna, Italy, characterised by a seabed composed of quartz pebbles and rocky outcrops. The site is suitable for beginners, with depths ranging from 1 to 10 metres and an average depth of 5 metres. Access is via a shore entry. Conditions include mild currents and visibility that varies from 5 metres upwards. Water temperatures fluctuate between 14C and 26C, and a wetsuit is recommended due to the cool sea temperatures. Facilities available at the site include parking, showers, and toilets. Divers and snorkellers should remain aware of potential hazards, including boat traffic, rip currents, and sea urchins.

Is Arutas (North Rocks) is a coastal site in Sardegna, Italy, distinguished by its unique quartz sand beach. Snorkellers access the water directly from the shore at the northern rocky headland. The seabed is rocky and the water depth increases rapidly, providing a clear view of the underwater terrain. The site is suitable for beginners and offers a moderate snorkelling experience. Water temperatures fluctuate throughout the year, ranging from 14C in February to 26C in August. The habitat supports a variety of Mediterranean reef fish and invertebrates typical of this rocky coastal environment.

Gli Archetti is a reef site located 300 metres off the coast of Sardegna, Italy, near Oristano. This site is suitable for beginners, offering a comfortable depth range between 6 and 12 metres with an average of 8 metres. Divers experience mild currents and consistent visibility of 30 metres. Access is by boat only, requiring local charter arrangements. Water temperatures fluctuate significantly throughout the year, ranging from 14°C in February to 26°C in August, necessitating careful selection of thermal protection. The reef habitat supports a variety of Mediterranean reef fish and invertebrates typical of the region.

Cala dei Pastori is a marine site located in Sardegna, Italy, featuring a combination of reef topography and Roman shipwrecks. Situated within a Marine Protected Area, the site is accessible only by boat, lying approximately 9260 metres from the shore. Depths range from 5 to 27 metres, with an average depth of 5 metres. Conditions vary, with visibility typically between 10 and 25 metres and moderate currents. Due to the depth and potential for boat traffic and surf, this site is suited for advanced divers. The location is also highly rated for snorkelling.

Torre del Pozzo is a marine site featuring a combination of reef, cave, and cavern topography. The site is named for a natural vertical well in the rock that connects to the sea through an underwater corridor. Divers and snorkelers can explore the entrance of this corridor, where light filters through the rock structure. Access is via the shore, with depths ranging from 2 to 11 metres and an average depth of 6 metres. Conditions include mild currents and visibility typically between 15 and 25 metres. Due to the overhead environment and depth, this site is suited for advanced skill levels.

S'Archittu is a natural limestone arch formation located in Sardegna, Italy. This site features a reef and cave system accessible from the shore. Divers and snorkellers can swim directly under the arch to explore rocky walls and small sea-carved caves. Conditions vary, and the site is best suited for intermediate skill levels due to potential surf. Water temperatures range from 14C in February to 26C in August. Facilities at the site include parking and a cafe. Snorkelling is well-regarded here, offering a unique perspective of the geological features.