The rescue ship Mimis lies in the waters off Attica at a depth of 70 to 80 metres. This wreck is a technical dive site requiring advanced certification and careful gas management. The structure remains largely intact, offering a challenging environment for experienced divers. Visibility typically ranges from 10 to 20 metres, and the site experiences mild currents. Due to the significant depth, divers must plan for decompression stops and manage nitrogen narcosis risks. Access is exclusively by boat, and the site is not suitable for recreational depth limits. Divers should confirm local conditions and operator availability before planning a visit.

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.

Attica Wreck is a shore-accessible site offering a diverse underwater landscape within a modest depth range of 5 to 15 metres. The topography transitions through reef, wall, cave, and wreck sections, complemented by an artificial reef structure. With mild currents and visibility typically ranging from 20 to 30 metres, the site is well-suited for beginner divers. A dive shop is located on-site to provide air fills. Divers should be aware of sea urchins present on the reef and near the shore entry point; shuffle your feet when entering or exiting and avoid touching rocky surfaces or the reef structure.

The Avantis III is a deliberately sunk vessel located off the coast of Attica, Greece, functioning as an artificial reef. The wreck lies at depths ranging from 15 to 48 metres, with an average depth of 32 metres. Access is strictly by boat. Conditions include mild currents and visibility typically between 10 and 30 metres. Due to the significant depth and overhead environment, this site is suitable for advanced divers only. Divers should be aware of risks including entanglement, nitrogen narcosis, and disorientation within the wreck. Proper planning, torch use, and clear exit awareness are essential for safe penetration of the deeper sections.

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.