Achai Caves on the west coast of Paxos Island consist of a trio of marine caves. The second cave features a partially collapsed roof that allows sunlight to penetrate the water, while the third cave contains a small internal beach. Access to this site requires a boat. Divers and snorkellers can expect visibility between 20 and 30 metres. The site is suited for advanced divers due to the overhead environment, with depths ranging from 15 to 28 metres. Species recorded around this area include European Parrotfish, Turkish Wrasse, Castagnole, and Long-spined Sea Urchin. Water temperatures fluctuate between 15C and 21C throughout the year.

Alexanders Cave is a boat-access dive site located off Paxos Island in the Ionian Islands. The site features a cave environment with depths ranging from 15 to 30 metres, averaging 22 metres. It is suited for intermediate divers looking to gain experience in overhead environments. Conditions are generally manageable with mild currents and visibility between 15 and 30 metres. Divers should carry a primary dive light and a backup torch to explore the cave interior. As facilities vary, confirm boat operator availability and gear rental options on Paxos Island before planning your trip. Typical dives at this location last approximately 45 minutes.

Arch of the Temple is a reef and cave site located 1000 metres off the coast of Paxos Island. The site is defined by a distinctive geological arch formation. Divers typically explore at depths between 15 and 20 metres, with an average depth of 18 metres. Visibility is consistently 30 metres. The site is accessed by boat and is suited for intermediate divers. Hazards include sea urchins on rock faces and sharp rock surfaces within the cave. Maintaining careful buoyancy is necessary to avoid contact with the cave walls. Guided tours are available to assist with navigation through the cave sections.

Ortholithos Rock is a massive vertical rock formation situated off the west coast of Paxos Island. This reef site is accessed by boat and is suitable for intermediate divers due to the deep water and overhead environment of the nearby sea cave. Visibility typically ranges from 10 to 25 metres, with moderate currents. Water temperatures fluctuate between 16C and 27C throughout the year. Species recorded around this area include European Parrotfish, wrasses, Turkish Wrasse, Castagnole, bream, White Seabream, Fangtooth Moray, Long-spined Sea Urchin, Hermit Crab, Needlefish, Goatfish, Mediterranean Cardinalfish, Purple Sea Star, and Wide Eyed Flounder.

Space Cave is an advanced technical dive located off the coast of Paxos Island. The site features an overhead environment with depths ranging from 25 to 54 metres. Divers experience 30-metre visibility, which illuminates the cave interior with a distinct blue-filtered light. The site is accessed by boat and is free of currents, though the depth and confined nature of the cave require precise buoyancy control and conservative gas planning. Due to the overhead environment and technical depth, guided tours are recommended to navigate the geometry of the cave safely. Facilities including air fills and equipment rental are available nearby.

Agrilas Reef is a rocky inlet located on the west coast of Paxos Island. This site features a reef structure with deep crevices and a cave system, making it suitable for advanced divers. The average depth is 15 metres, extending to a maximum of 30 metres. Shore access is available, and the site is also well-regarded for snorkelling. Visibility typically reaches 20 metres. Divers should be aware of boat traffic, overhead environments, and the presence of sharp coral and jellyfish. Species recorded around this area include European Parrotfish, wrasses, Turkish Wrasse, Castagnole, White Seabream, Bream, Fangtooth Moray, Flat Crab, Rabbitfish, Fireworm, Striped Red Mullet, Mauve Stinger, Two-banded Seabream, and Long-spined Sea Urchin.

Ypapanti Cave is the largest sea cave on Paxos Island, characterised by its purple-hued walls and blue water. The cave is deep enough for small boats to enter, and snorkelers can explore the inner chambers where sunlight filters through to illuminate the interior. Access to this site is by boat only. Due to the overhead environment, potential for low visibility, and boat traffic, this site is suited for intermediate snorkelers. Water temperatures at the site vary throughout the year, ranging from 16C in the cooler months to 27C in August.

Galazio Beach is a boat-access-only reef site located on the west coast of Paxos Island. The site is defined by a limestone seabed and surrounding cliffs, which contribute to visibility ranging from 10 to 25 metres. Snorkellers can explore the rock structures at depths between 2 and 10 metres, with an average depth of 6 metres. Due to its location 500 metres from the shore, a boat is required to reach the site. It is rated as an intermediate location for snorkelling, with typical sessions lasting around 45 minutes. Water temperatures fluctuate throughout the year, ranging from 16C in the winter months to 27C in August.