Centuri on the Cap Corse peninsula offers a classic Mediterranean snorkelling experience across a mix of reef and seagrass habitats. The site is accessible from the shore and features depths ranging from 1 to 7 metres, making it suitable for beginners. The environment is characterised by rocky topography and surrounding cliffs. Water temperatures fluctuate between 14C and 26C throughout the year, with mild currents typically present. Snorkellers can observe a variety of Mediterranean reef fish and invertebrates within the seagrass and rocky areas. Facilities including parking and a cafe are available nearby. Be aware of sharp rock when entering the water.

Marine d'Albo is a reef site in Corsica, France, characterised by a black pebble beach and rocky beds situated beneath a 16th-century Genoese tower. The site is suitable for beginners, with depths ranging from 1 to 6 metres and an average depth of 3 metres. Entry is via the shore, and snorkelers should be aware of sharp rocks in the area. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from 14C in winter to 26C in summer. Species recorded around this area include wrasses, sea stars, bream, Mediterranean moray, common octopus, European common cuttlefish, and various nudibranchs.

Nonza is a shore-accessible site in Corsica featuring a diverse underwater landscape of natural reefs, caves, and artificial reef structures. Divers can explore depths ranging from 30 to 36 metres, with visibility typically between 15 and 30 metres. The site is suited for intermediate divers, with mild currents generally keeping navigation manageable. Entry requires caution due to sharp rocks and coral along the shoreline, and divers should remain aware of potential surge and swell conditions near the coast. Water temperatures fluctuate between 14C in winter and 22C in summer, necessitating appropriate thermal protection for the 45-minute average dive duration.

Marine de Negru is a small beach situated along the steep coastline of Cap Corse. The site features a rock wall topography where cliffs descend directly into the sea. Snorkelling occurs along this drop-off, which reaches depths between 1 and 12 metres. Conditions are generally suitable for beginners, though the area is subject to mild currents and surf. Access is via the shore, with parking and a cafe available nearby. Water temperatures fluctuate seasonally, ranging from 14C in the winter months to 26C during August.

Capu Sagru is a rocky reef located on the east coast of Cap Corse, Corsica. The site features a topography defined by numerous cracks and crevices within the rocky seabed. Divers and snorkellers can expect depths ranging from 2 to 12 metres, with an average depth of 7 metres. Access is via the shore, and the site is suitable for intermediate divers. Conditions vary, with visibility typically between 5 and 20 metres and moderate currents. Hazards include the presence of jellyfish and potential surf. Parking is available for visitors. The site is well-regarded for snorkelling, holding a rating of 4 out of 5.

Le Canyon is a marine dive site located in Corsica, France. The site features a consistent depth of approximately 19 metres. Water temperatures at this location fluctuate throughout the year, ranging from 14C in the late winter and early spring months to a peak of 22C in August. Given the depth and the nature of the site, it is suitable for divers with appropriate training for this range. Access to the site is typically via boat, consistent with the topography of the surrounding region. Divers should be prepared for variable conditions typical of the Mediterranean environment.

L'Insuma is a 35-metre-long wreck of a former pleasure yacht converted into a German escort ship during World War II. Torpedoed by Allied forces in 1943, the vessel now rests flat on a sandy seabed at depths ranging from 39 to 43 metres. Located 900 metres offshore between Porticciolo and Pietra-Corbara, the wreck remains well-preserved, with identifiable features including the remains of a deck-mounted cannon. Due to the depth and potential for variable currents, this site is strictly for advanced divers. Access is exclusively by boat. Divers should remain vigilant regarding boat traffic in the area.

U Rigonne is a combined natural and artificial reef site located in Corsica, France. Suitable for intermediate divers, the site features a depth range extending to 35 metres. Access is strictly by boat, and divers should be prepared for moderate currents throughout the dive. Conditions can vary between visits, so local checks are recommended before entry. Given the depth and current, careful monitoring of dive profiles is essential. Water temperatures fluctuate between 14C and 22C, necessitating appropriate thermal protection depending on the season. As facilities are not guaranteed at the site, divers must arrive self-sufficient with all necessary equipment and surface support.