Legrena in Attica, Greece, offers a diverse underwater landscape featuring reefs, walls, an artificial reef, and a wreck. Located 450 metres from the shore, this site is accessible via a shore entry and is suitable for beginners. Divers can explore depths ranging from 2 to 45 metres, with an average depth of 25 metres. Conditions include mild currents and visibility between 10 and 20 metres. Water temperatures fluctuate between 16C and 22C throughout the year. Facilities at the site include parking, a dive shop, air fills, and guided tours. Divers should be aware of potential hazards including boat traffic, decompression, entanglement, and overhead environments.

Seal Cave in Attica, Greece, is a sheltered cave environment suitable for beginner divers. The site features depths ranging from 5 to 18 metres, with an average depth of 7 metres. Divers can access the cave via shore or boat entry. Conditions include mild currents and visibility that typically ranges between 10 and 30 metres. A notable feature is a cold section where fresh water mixes with warmer sea water, creating a distinct halocline effect. Due to the overhead environment and potential for variable visibility, divers should check local conditions before arrival. Facilities are not guaranteed on-site, so visitors should arrive fully equipped for their dive.

Kyra Leni is a two-hold bulk carrier wreck resting on a sandy seabed off Patroklos island. The vessel lies at depths ranging from 18 to 30 metres, with the stern at 16 metres and the bow at 30 metres. Due to storm damage, the superstructure is largely destroyed, limiting penetration opportunities. This site is accessible only by boat and features mild currents with visibility between 10 and 30 metres. It is suitable for beginners, though divers should be aware of hazards including boat traffic, depth, entanglement risks, and the overhead environment. Typical dives last around 40 minutes, and night diving is permitted.

Dikigorika Wall is a vertical reef structure in Attica, Greece, that descends from 18 to 35 metres. This site is suited for intermediate divers comfortable with deep diving. The wall face features sharp rock and coral edges, requiring careful buoyancy control to avoid contact. Visibility varies between 10 and 30 metres, with the best conditions typically found during morning dives before surface winds increase. Access is exclusively by boat. While the site is primarily defined by its topography, species recorded around this area include European parrotfish, white seabream, and dusky grouper. Divers should follow operator briefings regarding descent points and maintain awareness of their depth throughout the dive.

The Monrosa Wreck is a technical dive site located off the coast of Attica, Greece. Resting at depths between 70 and 91 metres, the wreck is strictly for experienced divers with trimix or decompression training. The site is accessed by boat, with visibility typically ranging from 10 to 30 metres and mild currents. Given the significant depth, divers must manage nitrogen narcosis risks and be cautious of entanglement hazards within the structure. The wreck provides a challenging environment for those qualified to operate at these depths, requiring meticulous gas management and team planning for the duration of the dive.

Simos Wreck is a shallow wreck site located off the coast of Attica, Greece. Resting at depths between 7 and 10 metres, the site is well-suited for beginner divers. The wreck is situated within seagrass beds, and visibility typically ranges from 10 to 30 metres. Conditions are generally manageable with a mild current. Divers can access the site via either shore or boat entry. For the best visibility, an early morning start is recommended to avoid sediment stirred up by boat traffic. The site remains accessible throughout the year, providing flexibility for dive planning.

Arzentas Canyon in Attica, Greece, is a diverse marine site featuring a reef, wall, cave, and canyon topography. Suitable for intermediate divers, the site requires boat access and offers depths ranging from 14 to 35 metres, with an average depth of 25 metres. Divers can expect mild currents and visibility between 10 and 25 metres. Water temperatures fluctuate throughout the year, ranging from 16C in the winter months to 24C in August. Due to the depth and the presence of an overhead environment, divers should be aware of risks associated with nitrogen narcosis and deep diving. Typical dives at this location last approximately 45 minutes.

The Rosa Vlasi is a technical wreck located off the coast of Attica, Greece. Resting at depths between 51 and 65 metres, this site is strictly for experienced technical divers. Access is by boat only, and divers must contend with moderate currents that can affect both descent and exit. Visibility at the site fluctuates between 10 and 30 metres. The wreck presents a significant overhead environment, necessitating proper training and redundant gas supplies for penetration. Given the depth, mandatory decompression stops are required for all dives. Divers should confirm current conditions with their operator before planning their descent.