Nikouria's Cavern is a marine site located 500 metres off the coast of Nikouria, Greece. The topography consists of a wall, reef, and cavern system with depths ranging from 5 to 25 metres, averaging 15 metres. The site is accessible only by boat. Divers and snorkellers should be prepared for mild currents and visibility between 10 and 25 metres. Water temperatures fluctuate between 17C and 23C, which may feel cold. The site is suitable for intermediate divers and offers opportunities for night diving. Facilities available nearby include air fills, guided tours, and equipment rental.

Big Cave is a boat-access site near Amorgos, Greece, defined by a substantial cave system and surrounding reef. The site offers depths ranging from 3 to 22 metres with an average of 12 metres. Visibility is consistent at 30 metres, and the lack of current makes it a manageable environment. Divers must be comfortable with overhead navigation, as the cave prevents direct surfacing. Hazards include sea urchins, sharp rock, and stonefish on the reef, requiring careful hand placement. Guided tours are available, and night diving is an option for those interested in exploring the cave after dark. Typical dive duration is 45 minutes.

Nikouria Beach is a marine site located on the uninhabited islet of Nikouria, accessible only by boat. The topography features a combination of sandy bottoms, rocky reefs, and caves. Divers and snorkellers can explore depths ranging from 2 to 22 metres, with an average depth of 8 metres. Conditions are generally calm with mild currents and visibility between 20 and 30 metres. Water temperatures vary from 17C to 24C throughout the year, and the site is considered suitable for beginners. Hazards include cold water and sharp coral. Typical dives last approximately 45 minutes, and the site is well-regarded for snorkelling.

Agios Pavlos is a distinctive natural sand spit extending towards Nikouria Island in Greece. This shallow site features a combination of reef and seagrass habitats, with an average depth of 4 metres and a maximum of 6 metres. It is accessible via a shore entry and is suitable for beginners. Divers and snorkellers can expect mild currents and visibility ranging from 40 to 50 metres. Water temperatures fluctuate between 17C and 24C, with conditions feeling slightly cold outside of the peak summer months of July and August. Typical dives last approximately 60 minutes, and the site is well-regarded for snorkelling.

Grabonissi Islet is a marine site located 500 metres from the shore near Nikouria, Greece. The topography features a reef, pinnacle, cave, and wall structure. Divers and snorkellers can expect depths ranging from 3 to 60 metres, with an average depth of 18 metres. The site is accessible by boat and is suitable for beginners, offering mild currents and visibility between 25 and 50 metres. Water temperatures fluctuate between 17C and 19C throughout the year. Night diving is available at this location, and typical dives last approximately 50 minutes. Facilities including a cafe and boat charter services are available nearby.

Agia Anna Beach in Greece offers a distinctive reef environment for snorkelers, featuring a dramatic rocky seabed with large boulders and steep drop-offs located just metres from the shore. This site is suitable for intermediate snorkelers, with depths ranging from 3 to 18 metres. Access is via the shore, and visitors should be aware of potential surf conditions. Visibility at the site typically varies between 10 and 25 metres, with mild currents present. Water temperatures fluctuate throughout the year, ranging from 17C in the cooler months to 24C in late summer. Facilities including parking and a cafe are available nearby for visitors.

Mouros Caves, located near Amorgos and Nikouria, feature two underwater caves situated on the right side of the beach. These geological formations are known for their distinct light reflections within the cave interiors. The site is accessible via a shore entry and is suitable for intermediate divers. Conditions generally include mild currents, with water temperatures ranging from 17C to 24C throughout the year. Facilities available at the location include parking and a cafe. The site is also highly rated for snorkelling.

Kalotaritissa Bay on Naxos is a sheltered natural harbour that remains calm even during strong Meltemi winds. This site features a mix of reef and artificial reef structures, with depths ranging from 1 to 15 metres and an average depth of 8 metres. The entry is from the shore via a smooth sandy beach, leading to small rocky patches. With visibility between 15 and 30 metres and mild currents, it is suitable for beginners. Water temperatures are typically a few degrees higher than other beaches on the island, ranging from 17C to 24C. Facilities at the site include parking and a cafe. Typical dives last approximately 50 minutes.