Lt221 is a World War II tugboat wreck located off the coast of Villasimius. The vessel lies on its side and is split in half, resting at depths between 36 and 49 metres, with an average depth of 40 metres. Due to the significant depth and the nature of the structure, this site is reserved for advanced divers. Access is strictly by boat. Divers should be aware of moderate currents and potential hazards including the depth of the wreck and the risk of entanglement within the structure. Visibility at the site can reach up to 50 metres.

Cala Regina is a rocky cove located 25km east of Cagliari, distinguished by a prominent Spanish watchtower overlooking the site. The seabed consists of rocky formations that reach depths between 2m and 15m, with an average depth of 7m. This shore-entry site is suitable for intermediate divers and offers visibility ranging from 10m to 25m. Currents are generally mild, though divers should be aware of sea urchins present in the area. With a 4/5 snorkel rating, the site is also accessible for surface exploration. Parking is available near the cove, and typical dives last approximately 60 minutes.

Cala Fighera is a rugged cove situated beneath the Sella del Diavolo cliffs near Cagliari. The site features a rocky seabed and is accessible via a shore entry. It is suited for intermediate snorkellers who can navigate the wild atmosphere of this secluded location. Water temperatures fluctuate significantly throughout the year, ranging from 14C in March to 27C in August. Divers and snorkellers should be aware of potential hazards including entanglement, overhead environments, and sharp coral. On-site facilities include parking, showers, changing rooms, toilets, and a rinse station, with dive shops nearby offering air fills, equipment rental, boat charters, and guided tours.

Grotta dei Colombi is a sea cave situated at the base of the Sant'Elia promontory near Villasimius. Accessible only by boat, the site is suited for intermediate snorkelers who can navigate the cave environment. The location is noted for its light play within the cave structure. Water temperatures in the area fluctuate throughout the year, ranging from 14C in March to 27C in August. As a marine site, it offers a distinct coastal experience for those exploring the waters of Sardegna.

Mari Pintau in Villasimius is a coastal site featuring a smooth pebble entry that transitions into a sandy bottom. The site consists of a reef and an artificial reef, with a submerged anchor located on the right side. Depths range from 2 to 10 metres, with an average of 4 metres, making it suitable for beginners. Conditions include mild currents and potential surf. Facilities available at the site include parking, toilets, showers, and a cafe. Guided tours are also available for those visiting the area.

Calamosca is a sheltered cove near Cagliari, featuring a sandy central area flanked by rocky margins. This site is suitable for beginners, with an average depth of 3 metres and a maximum depth of 5 metres. Access is via the shore, and the site offers mild currents, making it a straightforward location for a 60-minute dive or a snorkel. Parking is available nearby. Water temperatures fluctuate between 14C and 27C throughout the year, so a wetsuit is recommended for comfort. The rocky topography provides a habitat for Mediterranean marine life.

Cala Bernat is a quiet cove in Villasimius, Italy, offering a peaceful environment for divers and snorkellers. The site features a mixed seabed of sand and rocks, with depths ranging from 1 to 8 metres and an average of 4 metres. Conditions are generally mild, with visibility varying between 5 and 15 metres. The site is suitable for beginners and accessible by both shore and boat. Divers should be aware of sea urchins present in the area. The habitat supports a variety of Mediterranean reef fish and invertebrates typical of the region. Typical dives last approximately 30 minutes.

Sassone is a reef site located in Villasimius, Italy, featuring a large stone formation that rises from a sandy bottom. The site is well suited for beginners and trainee divers, offering depths ranging from 5 to 18 metres with an average depth of 14 metres. Access to the site is by boat only. Divers can expect mild currents and visibility between 15 and 30 metres. Water temperatures fluctuate throughout the year, ranging from 15C in winter to 24C in September. Hazards at this location include boat traffic, sea urchins, and sharp coral. Typical dives at this site last approximately 45 minutes.