Cala Di U Grecu is a sheltered reef site located on the east coast of the Lavezzi Islands. This site consists of two small bays situated near the eastern jetty, offering a shallow environment ranging from 1 to 6 metres in depth. Accessible directly from the shore, the area features mild currents, making it suitable for beginners. Snorkellers should remain aware of potential boat traffic in the vicinity and the presence of jellyfish. As part of a long-standing marine preserve, the site provides a protected environment for observing the local marine habitat.

Cala Della Chiesa is a snorkel site located on the north coast of the Lavezzi Islands, featuring a topography of granite blocks and white sand. The site consists of reef and seagrass habitats at depths ranging from 1 to 12 metres, with an average depth of 3 metres. Snorkellers can observe various species including wrasses, bream, white seabream, two-banded seabream, painted comber, wide-eyed flounder, striped red mullet, tompot blenny, mauve stinger, castagnole, salema porgy, snails, and triplefin. Access is by boat, and the site is suitable for beginners. Conditions include mild currents and visibility between 5 and 20 metres. Be aware of potential hazards including boat traffic, jellyfish, and strong currents.

Cala Achiarina is a reef and seagrass site located on the west coast of the main island in the Lavezzi Islands. This shallow location features an average depth of 3 metres, ranging between 2 and 4 metres, making it suitable for beginners. Divers and snorkellers access the site directly from the shore, with the main area situated 15 metres from the beach. Conditions are generally mild with visibility ranging from 5 to 25 metres. Water temperatures fluctuate seasonally from 14C in winter to 26C in August. Divers should be aware of the presence of jellyfish in the area.

Mérouville is a marine dive site located within the Lavezzi Islands, France. The site features a depth range typically between 11 and 15 metres. Conditions at this location vary throughout the year, with water temperatures ranging from 14C in the late winter and early spring to 24C during the peak of summer in August. The site is accessible for diving activities, with records of dives spanning from 2000 to 2013. Divers should be prepared for variable conditions typical of the region when planning their visit to this Corsican site.

Tête de cheval in the Lavezzi Islands features a dramatic wall and cave system that descends from 5 to 35 metres. This boat-only site is suited for intermediate divers due to strong currents and the presence of overhead environments. Visibility typically ranges between 10 and 25 metres. Divers should monitor their depth closely to manage decompression limits and nitrogen narcosis. The site requires careful buoyancy control, particularly when navigating the cave structures. Boat traffic is a hazard upon surfacing, and divers should remain cautious of sharp rocks. Guided tours are available to assist with navigating the tidal windows and local conditions.

Cala Lunga is a narrow, deep inlet situated on the uninhabited island of Razzoli within the La Maddalena Archipelago. This rocky reef site is accessible only by boat and features depths ranging from 2 to 4 metres. Divers and snorkellers experience a rugged, remote environment with visibility fluctuating between 5 and 25 metres. Conditions include mild currents and potential surge, requiring intermediate skill levels. Due to the nature of the location, visitors must remain aware of boat traffic in the area. The water temperature varies significantly throughout the year, ranging from 14C in late winter to 26C in August.

Secca di Washington is a seamount in the La Maddalena Archipelago that rises from a depth of 40 metres to a shallow crest at 6 metres. This site features a combination of reef and wall topography. Divers must access the site by boat, as it is not reachable from the shore. Conditions are variable, with visibility reaching up to 30 metres and water temperatures ranging between 14 and 18 degrees Celsius. Due to the potential for strong and unpredictable currents, this site is recommended for advanced divers only. Proper planning is essential to manage current strength and ensure a safe ascent.

Passo Cecca di Morto is a shallow lagoon-like pass situated between the islands of Budelli and Santa Maria in the La Maddalena Archipelago. This site features a combination of reef and seagrass habitats, with depths ranging from the surface to 4 metres, averaging 2 metres. It is accessible only by boat. Conditions include mild currents and visibility typically between 10 and 25 metres. Water temperatures fluctuate seasonally from 14C in winter to 26C in August. Due to the nature of the area, snorkelers should remain aware of boat traffic and the presence of sea urchins. The site is rated highly for snorkelling, with typical sessions lasting 30 minutes.