Dragonisi, also known as Seal Cave, is an uninhabited islet in the Cyclades featuring extensive sea caves and tunnels. This boat-access site offers depths ranging from 3 to 30 metres with visibility between 25 and 50 metres. The environment is suitable for intermediate snorkelers, though the presence of overhead environments and sea urchins requires caution. Water temperatures fluctuate between 16C and 25C throughout the year, with the swimming season typically beginning in May. The site is a protected nature reserve. Snorkelers can expect to encounter typical Mediterranean reef habitats, which support a variety of regional reef fish and invertebrates.

Frangias Beach in the Cyclades features submerged rock reefs suitable for both diving and snorkelling. The site offers depths ranging from 5 to 20 metres, with an average depth of 12 metres. Divers and snorkellers can expect visibility between 15 and 30 metres and mild currents. Access to the site is possible by both boat and a challenging hike from the shore. Water temperatures fluctuate between 16C and 24C throughout the year. Due to the presence of boat traffic and sea urchins, caution is advised during entry and exit. The site is best suited for intermediate skill levels, with typical dives lasting approximately 60 minutes.

The Anna II is a 62m cargo ship that sank in 1995 while carrying a cargo of cement. Resting on the seabed in the Cyclades, the wreck remains largely intact and offers opportunities for penetration in select areas. The site is situated 500m from the shore and requires boat access. Divers can expect depths ranging from 18m to 36m, with an average depth of 20m. Conditions feature mild currents and visibility between 10m and 30m. Water temperatures fluctuate between 16C and 21C throughout the year. Hazards include potential entanglement and sharp structures on the wreck. Guided tours, air fills, and equipment rental are available for this intermediate-level dive.

Lia Beach in the Cyclades offers a diverse reef environment suitable for intermediate divers and snorkellers. The site features rocky headlands on both sides of the bay, providing access to depths ranging from 2 to 40 metres. Conditions are generally calm, as the bay is protected from northern winds, with visibility typically between 10 and 40 metres. Shore entry is available, and the site supports night diving. Facilities at the location include parking, toilets, showers, changing rooms, a rinse station, air fills, a cafe, a dive shop, and guided tours. Typical dives last approximately 50 minutes, and the site is highly regarded for snorkelling.

Agia Anna Beach is a sheltered bay in the Cyclades, Greece, offering a shallow environment suitable for both diving and snorkelling. The site features a mix of reef and wall topography with an average depth of 3 metres, ranging from 1 to 4 metres. Entry is via the shore, and conditions are generally mild with visibility between 5 and 15 metres. The site is well-suited for beginners and families, supported by facilities including parking, showers, changing rooms, toilets, and a cafe. Divers and snorkellers should remain aware of boat traffic in the area and the presence of sea urchins on the seabed.

Mersini Beach in the Cyclades is a shore-entry reef site suitable for beginners. The area features a sandy seabed and depths ranging from 1 to 10 metres, with an average depth of 5 metres. Snorkellers can expect mild currents and visibility between 5 and 15 metres. The habitat supports a variety of Mediterranean reef fish and invertebrates typical of the region. Visitors should be aware of sea urchins and potential surf conditions when entering the water. This location offers a quiet environment for snorkelling, with water temperatures fluctuating between 16C and 25C throughout the year.

Platis Gialos Reef is a shore-entry site located in the Cyclades, Greece, offering a shallow reef environment suitable for beginners. The site features a submerged reef in the centre of the bay, flanked by 400 metres of rock-carved terrain along the eastern and western headlands. Depths range from 1 to 10 metres, with an average of 5 metres. Conditions vary, with visibility ranging between 5 and 25 metres and mild currents. Facilities at the site include parking, toilets, showers, changing rooms, a cafe, and a dive shop. Divers and snorkellers should be aware of jellyfish and sea urchins in the area.

Houlakia Beach is a protected natural monument in the Cyclades, Greece, characterised by a unique pebbled shoreline. The underwater topography features large boulders that create a dramatic landscape with gaps between the stones. Divers can explore this reef environment at depths ranging from 5 to 15 metres, with an average depth of 10 metres. Entry is via the shore, and conditions generally feature mild currents and visibility between 15 and 25 metres. The site is suitable for intermediate divers. Hazards include potential entanglement, sea urchins, and surf. Facilities available at the beach include parking, a cafe, and toilets.