Scoglio Marchesa is a reef site located in the Orosei Gulf, offering a rugged underwater terrain suitable for beginners. The site features shallow depths ranging from 1 to 8 metres, with an average of 4 metres. Access is via the shore, and conditions generally include mild currents and visibility between 10 and 30 metres. The rocky crevices provide habitat for various reef fish and invertebrates typical of the region. Facilities available at the site include parking, a cafe, a rinse station, and equipment rental. Divers and snorkellers should be aware of potential hazards, including sharp coral and stonefish.

Cala Liberotto in the Orosei Gulf is defined by three large granite rocks that emerge from the shallow water to form a natural reef system. This site is suitable for beginners, offering shore access and depths ranging from 1 to 15 metres, with an average depth of 7 metres. Visibility varies between 5 and 25 metres, and currents are generally mild. Facilities including parking, toilets, and showers are available nearby. Water temperatures fluctuate between 14C and 26C throughout the year, with a wetsuit recommended during the cooler shoulder seasons. A typical dive lasts approximately 60 minutes, and the site is well-regarded for snorkelling.

Biancas Garden is a reef and canyon site located off the Orosei coastline. The topography transitions from reef structures into canyon walls, with depths ranging from 16 to 24 metres and an average depth of 20 metres. Divers encounter mild currents and visibility between 10 and 30 metres. The site is suitable for intermediate divers. Water temperatures fluctuate between 14C and 24C throughout the year, requiring appropriate thermal protection. Boat access is mandatory, and divers must remain vigilant regarding boat traffic. Always deploy a surface marker buoy before ascending to ensure safety during the safety stop.

The KT12 wreck lies in the Orosei Gulf at depths ranging from 28 to 34 metres, with an average depth of 32 metres. This site requires boat access and is suited for intermediate divers with deep and wreck certifications. Visibility typically spans 10 to 30 metres, allowing for views of the structure. Divers should expect mild currents and monitor their depth closely due to the deep nature of the wreck. Thermoclines often occur around 12 metres, where temperatures may drop to 13-15°C. Entanglement hazards exist within the internal structures, and penetration should be avoided without appropriate overhead training. Typical dive times are approximately 40 minutes.

The KT-12 Stern is a historical wreck site located in the Orosei Gulf, Italy. This armed cargo ship was sunk in 1943, resulting in the hull separating into two distinct sections. Divers can explore the stern, which remains in good condition. Key features include a clearly visible stern cannon, as well as the propeller and rudder. The site sits at depths between 24 and 34 metres, with an average depth of 30 metres. Access is by boat only, located over 11 kilometres from the shore. Due to the depth and overhead environment, this site is suitable for advanced divers only. Visibility typically ranges from 15 to 30 metres.

Spiaggia di Osalla is a long beach in the Orosei Gulf, where the southern rocky headland offers the most suitable conditions for snorkelling. The site features a mix of rocky terrain and sandy patches, with depths typically ranging from 2 to 8 metres and an average of 4 metres. It is accessible directly from the shore and is well-suited for beginners. Visibility varies between 5 and 20 metres, and currents are generally moderate. Species recorded around this area include Mediterranean Moray, Turkish Wrasse, Scorpionfish, and various crabs. Facilities at the beach include parking, toilets, showers, changing rooms, and a cafe.

Secca di Punta Nera di Osala is a reef and canyon site located 2000 metres offshore in the Orosei Gulf. Divers explore depths between 20 and 24 metres, with an average depth of 22 metres. The site features a combination of reef structures and canyons, offering varied topography. Visibility is variable, ranging from 10 to 30 metres, while currents remain mild throughout the area. Access to this site requires a boat. Due to water temperatures fluctuating between 14 and 24 degrees Celsius, a 5mm wetsuit is recommended for dives outside of the summer season. This site is suitable for beginners with an open water certification.

Le Grottace in the Orosei Gulf offers a diverse underwater landscape featuring a cave, reef, and canyon. With an average depth of 12 metres and mild currents, the site is suitable for beginner divers. Visibility ranges from 10 to 30 metres, allowing for clear observation of the rocky architecture. Access is by boat only, and divers should remain aware of boat traffic near the surface. Inside the cave and canyon sections, maintain awareness of the overhead environment and stay close to your guide. Water temperatures fluctuate between 14C and 26C throughout the year, requiring appropriate thermal protection based on the season.