The Agios Marcos shipwreck is a deep-water site located off the coast of Attica, Greece. Resting at depths between 35 and 45 metres, with an average depth of 42 metres, this wreck is suited for intermediate divers comfortable with deeper profiles. Divers can expect mild currents and visibility ranging from 10 to 20 metres. The site is accessible via both shore and boat entry. Given the depth, careful planning of bottom time is essential for a safe 40-minute dive. Divers should ensure they have sufficient gas reserves for the deeper sections of the structure.

Vouliagmenis Lake in Attica is a complex dive site featuring cave, drift, and artificial reef elements. Divers access the water from the shore to explore depths ranging from 2 to 20 metres. The environment is characterised by brackish water that transitions to seawater at approximately 40 metres, influenced by a freshwater spring. Conditions include strong currents and an overhead environment, requiring intermediate skill levels. Facilities at the site include parking, toilets, showers, changing rooms, air fills, a dive shop, and guided tours. Divers should be aware of hazards including the deep nature of the site, potential for entanglement, and the overhead environment.

1st Cove Vouliagmeni is a reef site in Attica, Greece, offering shore access for divers. The site features a depth range of 2 to 25 metres, with an average depth of 4 metres. Conditions are variable, with visibility ranging from 5 to 60 metres and mild currents. The site is suitable for beginners, though divers should be aware of hazards including deep sections, potential overhead environments, and strong currents. Facilities at the location include changing rooms, showers, toilets, a cafe, and a dive shop. A typical dive at this location lasts 45 minutes.

2nd Limanaki in Attica offers a diverse shore dive combining a reef and a cave system. The site reaches depths of 30 metres, with an average of 15 metres. Divers encounter a reef environment that transitions into an overhead cave section, requiring careful buoyancy control and planning. Conditions vary, with visibility ranging from 5 to 20 metres and strong currents present. Due to the depth and overhead environment, this site is suited for intermediate divers. Facilities at the location include changing rooms, showers, toilets, a cafe, and a dive shop. Typical dives last approximately 40 minutes, with May and October providing the most settled conditions.

Seals is a shore-entry reef and cave dive located in Attica, Greece. Suitable for beginners, the site offers depths ranging from 3 to 21 metres. Divers can expect mild currents and visibility typically between 10 and 30 metres. The site is accessible year-round, though conditions can shift, so checking with local dive centres or harbour masters before entry is recommended. Facilities including parking, toilets, showers, changing rooms, a rinse station, air fills, and guided tours are available in the area. Note that facilities are not confirmed on-site, so divers should arrive prepared. Hazards at this location include jellyfish and sharp coral.

Balco sub is a wreck dive located in Attica, Greece, suited for advanced divers. The site features a wreck structure resting at depths between 18 and 30 metres, with an average depth of 24 metres. Divers enter from the shore to explore the wreck, which requires careful navigation due to the overhead environment and potential for entanglement. Visibility typically ranges from 15 to 25 metres, though conditions vary alongside moderate currents. Species recorded around this area include crab, bream, snail, and rockpool prawn. Divers should arrive self-sufficient as there are no on-site facilities, and confirm access arrangements locally before planning a dive.

Koumoundourou Islet in Attica, Greece, provides a straightforward shore entry suitable for beginner divers. This site features a combination of natural and artificial reef structures at depths ranging from 3 to 12 metres, with an average depth of 7 metres. Divers experience mild currents and visibility typically between 10 and 20 metres. Water temperatures fluctuate between 15C and 27C, making a wetsuit recommended for comfort. Species recorded around this area include bream, crab, snail, and rockpool prawn. The site is accessible year-round, though divers should check locally for parking and access arrangements before arrival. A typical dive duration here is 45 minutes.

Halkeas is a shore-entry reef dive located in Attica, Greece. The site is suitable for beginners, offering a straightforward entry and shallow depths ranging from 6 to 18 metres, with an average depth of 12 metres. Divers typically spend 45 minutes exploring the reef. Conditions are variable, with visibility generally between 15 and 25 metres and mild currents. Water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 26C in late summer. As conditions can change, it is recommended to check local reports before entering the water. Facilities such as air fills and equipment rental are available nearby, though visitors should arrive prepared.