Koh Mapring is a reef site located in Koh Rang National Park, offering depths between 5 and 18 metres with an average of 12 metres. The site is well-suited for beginners due to mild currents and manageable depths. Access is by boat only. Visibility fluctuates significantly, ranging from 3 to 25 metres. Divers and snorkellers should be aware of sea urchins present on the reef and avoid contact with the surface. A typical dive lasts 45 minutes. The site rewards slow, methodical exploration, particularly in shallower sections where smaller marine life can be observed. Always consult your operator regarding recent visibility conditions before departure.

Na Tham in Koh Rang National Park offers a unique combination of a shallow cave, reef, and wall topography. The site is accessible by boat and features depths ranging from 3 to 12 metres, making it suitable for beginners. Divers navigate a mild current with visibility typically between 5 and 20 metres. The cave creates an overhead environment, requiring divers to maintain orientation and keep the exit in sight. A torch is recommended for the cave entrance. Divers should exercise caution to avoid contact with sharp coral and rocks along the wall and reef structures. Facilities including toilets and showers are available.

Koh Thian is a reef site located 1000 metres from shore in Koh Rang National Park. This site offers depths ranging from 5 to 15 metres, with an average depth of 10 metres. Access is by boat only. Divers and snorkellers experience mild currents and visibility between 5 and 20 metres. The water temperature remains consistently warm, between 29C and 31C. Due to the presence of jellyfish and sharp coral, wearing a wetsuit is recommended for protection. The site is suited for intermediate skill levels, and guided tours are available to help locate the most rewarding sections of the reef.

Koh Yak Lek is a reef site located within Koh Rang National Park. The topography features a reef that circles the island, offering a variety of coral formations. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 8 metres. Access to the site is by boat, as it is situated 1000 metres from the shore. Conditions are generally mild, with visibility ranging from 5 to 25 metres and water temperatures between 28 and 31C. This site is suitable for beginners and typically involves a 50-minute dive. Guided tours are available through local dive shops.

Hin Kuak Ma is a reef pinnacle located in Koh Rang National Park. Reached by boat, this site features depths ranging from 10 to 16 metres, making it suitable for beginner divers. The environment is characterised by mild currents and water temperatures between 29 and 31 degrees Celsius. Visibility fluctuates between 5 and 25 metres, often appearing clearest during morning hours. Divers should be aware that stonefish are present at this site, camouflaging against the reef and sandy seabed. To protect the environment and avoid injury, do not touch the reef or rest on the bottom. A typical dive duration at this location is 50 minutes.

Koh Mapring Lek is a reef site located within Koh Rang National Park. Accessible only by boat, the site features depths ranging from 5 to 12 metres, with an average depth of 8 metres. Conditions are generally mild, with visibility typically between 5 and 15 metres. The water remains consistently warm throughout the year, ranging from 29 to 31 degrees Celsius. This site is suitable for beginners and supports both diving and snorkelling activities. Divers should remain aware of boat traffic in the area. A typical dive duration at this location is approximately 45 minutes.

Koh Yak is a reef site located within Koh Rang National Park, accessible only by boat from Koh Chang. The site features depths ranging from 10 to 15 metres, with an average depth of 10 metres, making it suitable for beginner divers. Conditions are generally mild, with light currents and visibility that fluctuates between 5 and 20 metres. Typical dives last approximately 60 minutes. Due to the variable visibility, booking a guided tour is recommended to navigate the reef effectively. The site offers a straightforward underwater environment for those looking to explore the local reef topography.

Koh Rang National Park offers a diverse underwater landscape featuring reefs, pinnacles, and artificial structures including wrecks. Depths range from 9 to 30 metres, with an average of 15 metres. Access is by boat only, as the site is located 10 kilometres from shore. Conditions vary, with visibility between 5 and 30 metres and moderate currents that can strengthen quickly, especially around pinnacles. The site is suitable for intermediate divers and supports night diving. Guided tours are recommended to navigate the terrain and manage changing conditions. Hazards include sharp coral and stonefish, so maintain neutral buoyancy and avoid contact with the substrate.