Alonaki in Santorini offers a varied underwater landscape for intermediate divers, featuring a combination of reef, wall, drop-off, and cave formations. The site ranges from a shallow reef at 5 metres down to a maximum depth of 30 metres, with an average depth of 15 metres. Visibility typically spans 10 to 30 metres. Divers should be aware of surge and swell near the wall and cave entrance, which can push against these features. Sea urchins and sharp coral are present, requiring careful buoyancy control. Both shore and boat entries are available, allowing for flexible access depending on the daily sea state and wind conditions.

Lava Reef in Santorini features volcanic geology comprising a reef, wall, drop-off, and cave. The site is suitable for beginners, with depths ranging from 10 to 23 metres and an average depth of 17 metres. Divers experience mild currents and visibility between 10 and 30 metres. Access is by boat only, with typical dives lasting 50 minutes. Hazards include sharp volcanic rock and coral, sea urchins in crevices, and an overhead environment within the cave. Divers should monitor their depth and buoyancy carefully. Facilities available include equipment rental, air fills, and guided boat tours.

The WWII Boat Wreck near Santorini is an artificial reef resting at depths of 10 to 15 metres, with an average depth of 12 metres. Located 2000 metres from shore, this site requires boat access. The wreck structure features sharp edges and potential entanglement points, necessitating careful buoyancy control. Visibility typically ranges from 10 to 30 metres, though it can fluctuate. The site is suitable for beginners and is open for night diving, which offers a different perspective of the structure. Divers should remain close to their guides, particularly when visibility is low, and avoid entering areas where the exit is not clearly visible.

Pavlos Gulf in Santorini offers a diverse underwater landscape featuring a reef, a wall, and a cave system. The site is suitable for intermediate divers, with depths ranging from 6 to 30 metres and an average depth of 20 metres. Visibility is typically between 15 and 30 metres, supported by mild currents. Divers can access the site via shore or boat. On-site facilities include changing rooms, showers, and air fills, allowing for convenient back-to-back dives. The cave section requires careful planning of air supply and bottom time. The site is accessible year-round, with water temperatures fluctuating between 17C and 24C depending on the month.

Palia Kameni Wreck is an artificial reef located in the waters of Santorini, Greece. The site is strictly for advanced divers, with the wreck structure lying at depths between 22 and 33 metres. Access is by boat only. Divers encounter mild currents and visibility ranging from 10 to 30 metres. Species recorded around this area include Mediterranean moray, Turkish wrasse, white seabream, and various species of wrasses and bream. Facilities including showers and changing rooms are available. Given the depth, divers should manage bottom time carefully, with typical dives lasting 45 minutes. Water temperatures fluctuate between 17C and 23C throughout the year.

Afalatosi is a varied underwater site in Santorini featuring a combination of reef, wall, and cave topography. Reached exclusively by boat, the site ranges from 15 to 30 metres in depth, with an average of 17 metres. Visibility typically spans 15 to 30 metres, assisting navigation along the walls and cave entrances. A mild current is common, though divers should be aware that surge and swell can develop, particularly within the cave sections. Due to the depth range and potential for surge, this site is suited for intermediate divers. Divers should monitor conditions closely and coordinate with local operators, as sea states around Santorini can shift with little warning.

Skaros Wall is a reef and wall dive site located in Santorini, Greece. The site maintains a consistent depth of 10 metres, making it well-suited for beginner divers. Divers access the site exclusively by boat. Conditions are stable with no current and visibility reaching 30 metres, providing a clear environment for buoyancy practice and reef observation. Water temperatures range from 17C in the winter and spring months to 25C during the peak of summer. The site offers a straightforward underwater experience within the Aegean Sea, allowing divers to explore the reef structure at a relaxed pace.

Old Mine in Santorini offers a diverse underwater landscape combining natural reef, cave sections, and artificial reef structures. The site ranges from shallow depths down to 30 metres, with an average depth of 18 metres, making it suitable for intermediate divers. Visibility typically spans 15 to 30 metres, assisting with navigation through the varied terrain. Currents are generally mild, allowing for a relaxed pace during the typical 45-minute dive. Access is flexible, with both shore and boat entries available. Divers should check locally for facility availability before planning their visit, as services can vary by season.