Xyla Beach in Attica, Greece, features a secluded cove located south of the main beach. This reef site offers varied underwater topography with depths ranging from 2 to 30 metres, averaging 22 metres. Access is via a shore entry, and the site is suitable for intermediate snorkelers and divers. Conditions are variable, with visibility ranging from 5 to 30 metres and mild currents. Divers should be aware of potential surf conditions at this location. Parking is available for visitors. A typical dive session lasts approximately 60 minutes.

Marades is a wreck dive site in Attica, Greece, featuring the remains of a small cargo ship approximately 30 metres in length. Resting at a consistent depth of 10 metres, this site is suitable for beginners and serves as an accessible dive. Access is by boat only. Divers should be aware of potential entanglement hazards within the wreck structure. Visibility at the site ranges from 5 to 20 metres, with mild currents typically present. Water temperatures fluctuate throughout the year, ranging from 16C in the winter months to 26C in August. A typical dive at this location lasts around 40 minutes.

Pisses Beach in Attica, Greece, features rocky outcrops at its northern end that provide shelter for marine life. This shore-entry site is suitable for beginners, with depths ranging from 2 to 10 metres and an average depth of 6 metres. Conditions vary, with visibility between 5 and 25 metres and mild currents. Water temperatures fluctuate from 16C in winter to 26C in August, though temperatures can drop to 12C in April. Facilities at the site include parking, toilets, showers, changing rooms, and a cafe. Divers should be aware of potential surf and sharp coral. Typical dives last approximately 45 minutes.

Kefalas Beach, located on the north coast of Kea Island in Attica, Greece, is a reef site primarily accessed by boat. This location is suitable for beginners, offering a snorkel rating of 3 out of 5. The site features sandy shallows where the topography is defined by the seabed. Conditions are generally mild, with water temperatures ranging from 16C in the winter months to 26C in August. Divers and snorkellers should be prepared for mild currents while exploring the area.

The HMHS Britannic is a significant technical dive site located off Kea Island, Attica. Resting at depths between 110 and 122 metres, the wreck of this sister ship to the Titanic remains largely intact, with recognisable features including the hull, funnels, davits, and superstructure. This site is reserved for expert divers due to the extreme depth, substantial decompression requirements, and strong currents. Visibility varies between 10 and 30 metres. Access is strictly by boat, and divers must manage hazards including overhead environments, nitrogen narcosis, and active boat traffic. Meticulous dive planning and redundant gas supplies are essential for all visitors to this deep-water wreck.

Glaronisi Rock is a small rocky islet located 60 metres from the shore near Otzias beach in Attica, Greece. This reef site features a rocky terrain with depths ranging from 15 to 30 metres, averaging 25 metres. Access is by boat only. The site is suitable for intermediate divers due to the presence of moderate currents. Snorkellers can also enjoy the area, which holds a rating of 4 out of 5. Divers should be aware of potential hazards, including lionfish and strong currents. Local facilities provide air fills, equipment rental, and guided tours to support diving activities.

Koundouraki Reef is a diverse marine site located 400 metres off the coast of Attica, Greece. The topography features a reef structure that includes a drop-off, cave formations, and a wreck. The site is suitable for intermediate divers, with depths ranging from 1 to 40 metres and an average depth of 12 metres. Visibility typically spans 15 to 30 metres, with mild currents. Entry is possible from both shore and boat. The site is also well-suited for snorkelling. Divers should be aware of potential hazards, including boat traffic, deep sections, entanglement risks, and sharp coral. Guided tours and dive shop support are available for those exploring the area.

Koundouros reef in Attica, Greece, offers a diverse underwater landscape featuring a reef, a cave system, and a wreck. Located 400 metres from shore, the site reaches depths between 12 and 45 metres. Visibility typically ranges from 15 to 30 metres, with mild currents that can occasionally strengthen. The site is suitable for intermediate divers, though the cave and wreck are overhead environments requiring specific certification and equipment. Shore and boat entries are both available. The area supports a variety of Mediterranean reef fish and invertebrates. Divers should monitor conditions for potential down currents and thermoclines before descending.