Chimney Cave near Rethymno offers a combined cavern and wall diving experience accessible only by boat. The site is named for its distinctive chimney-like formation, which allows light to filter down into the depths. Divers can explore between 15 and 30 metres, with an average depth of 18 metres. Visibility ranges from 10 to 30 metres, and currents are generally mild. Due to the overhead environment within the cave sections, divers must maintain good buoyancy control and remain with a guide. This site is suitable for beginners, though cave certification is required for entry into the specific cave portions.

Plakias Beach East End in Rethymno, Crete, features a diverse underwater landscape comprising reef, cave, cavern, and artificial reef structures. Located 50 metres from the shore, this site is suitable for beginners, with depths ranging from 2 to 5 metres and an average of 3 metres. Visibility typically spans 10 to 30 metres. Divers and snorkellers can access the site from the shore or by boat. Be cautious of moderate currents and potential surf at the shoreline, which can complicate entry and exit. When exploring the cave or cavern, maintain sight of the entrance and natural light at all times. The site is available for both day and night sessions.

Cape Plakias-Kalypso is a diverse marine site featuring a reef, wall, cave, and drop-off topography. Located in Rethymno, Greece, the site offers depths ranging from 3 to 40 metres, with an average depth of 18 metres. Visibility is consistently 30 metres, providing clear conditions for both divers and snorkellers. Access is possible via both shore and boat. Due to the presence of overhead environments, deep sections, and moderate currents, this site is suited for intermediate skill levels. Hazards include lionfish, sea urchins, and strong currents. Facilities available include parking, toilets, showers, changing rooms, air fills, equipment rental, and a cafe. Night diving is permitted, with typical dives lasting 45 minutes.

Kalypso Walls in Rethymno, Greece, offers a diverse underwater landscape featuring a reef, wall, drop-off, and cave. Accessible via both shore and boat, the site provides visibility ranging from 15 to 30 metres and mild currents. While the topography shelves to a maximum depth of 40 metres, the shallower reef sections are suitable for beginners. Divers should exercise caution regarding sea urchins on the reef and during entry. The site is well-equipped with parking, toilets, showers, changing rooms, and a rinse station. Night diving is available year-round for qualified divers, with typical dives lasting around 50 minutes.

One Rock, located off the west side of Damnoni Bay, features a diverse underwater landscape comprising reef, wall, cave, and seagrass habitats. Divers can explore depths between 10 and 30 metres with visibility typically ranging from 10 to 30 metres. The site is suitable for intermediate divers, with mild currents and both shore and boat entry options available. Onsite facilities include parking, showers, and changing rooms. Species recorded around this area include lionfish, octopus, cuttlefish, moray eels, barracuda, wrasses, parrotfish, and various invertebrates. Due to regular boat traffic, divers should deploy a surface marker buoy before ascending. Keep hands clear of ledges and crevices to avoid contact with lionfish.

Damnoni Beach in Rethymno provides a versatile shore-entry dive across a varied topography of reef, seagrass beds, and walls with small caverns. Depths range from the shallows to 40 metres, with an average depth of 6 metres, making it suitable for beginners. Visibility typically reaches 20 to 30 metres. Divers frequently encounter Indian Lionfish and Bream, alongside less common species such as European Common Cuttlefish, Splendid Elysia, European Parrotfish, Pufferfish, various Wrasses, and Mediterranean Cardinalfish. Hazards include jellyfish, lionfish, sea urchins, sharp coral, and stonefish. Facilities at the site include parking, toilets, showers, changing rooms, air fills, a dive shop, and a cafe.

Ammoudi Reef in Rethymno offers a diverse underwater landscape featuring a reef, wall, wreck, and cave. Suitable for intermediate divers, the site ranges from 8 to 35 metres in depth with an average of 17 metres. Divers can access the site via shore or boat. Conditions are generally mild with visibility ranging from 10 to 30 metres. Due to the presence of boat traffic, divers should exercise caution during their 45-minute dives. Arriving early in the morning is recommended to benefit from calmer surface conditions and improved light penetration within the cave sections.

Grouper Rock is a reef site located off the coast of Rethymno, Crete, offering depths between 25 and 40 metres. This site is suitable for intermediate divers who possess solid buoyancy control and gas management skills. Divers can access the reef via shore or boat entry. Conditions include a mild current and visibility ranging from 10 to 30 metres. Water temperatures fluctuate between 16C and 21C throughout the year. Due to active vessel movement in the area, divers must exercise caution and always deploy a surface marker buoy before ascending to ensure visibility to boat traffic.