Koh Bon is a prominent site in the Similan Islands, offering a diverse underwater topography of reefs, walls, and pinnacles. Divers and snorkellers can explore depths ranging from 5 to 40 metres, with visibility typically between 20 and 40 metres. The site is characterised by moderate currents, making drift diving the standard approach. Due to the significant depth and potential for strong currents and surge, this site is suited for intermediate divers with appropriate buoyancy control. Boat access is required for all dives, and night diving is available. Divers should remain close to their guides and plan their drift carefully according to shifting tidal patterns.

Donald Duck Bay at Koh Bon is a reef and pinnacle site offering depths between 5 and 20 metres, with an average depth of 10 metres. Accessible only by boat, the site features mild currents and visibility ranging from 10 to 30 metres. Water temperatures typically remain between 28 and 30C, though occasional thermoclines may cause brief drops to 26-27C. The site is suitable for beginners and supports night diving. Facilities available include equipment rental, air fills, and rinse stations. Divers should remain aware of boat traffic, jellyfish, and sharp coral in the area.

Beacon Reef at Koh Bon offers a dual experience featuring both a coral reef and a wreck. The site ranges from 5 to 40 metres in depth, with an average of 15 metres suitable for beginners in the shallower sections. Visibility typically spans 10 to 30 metres. Access is by boat, and divers should be prepared for moderate currents. The wreck provides an overhead environment, requiring caution and proper training for entry. Hazards include sharp coral, deep sections, and the presence of stonefish and triggerfish. Night diving is available, allowing for a different perspective of the reef structure.

Waterfall Bay is a reef site located at Koh Bon, Thailand, offering a gentle environment suitable for beginner divers. The site features depths ranging from 10 to 20 metres with an average of 14 metres. Visibility typically spans 15 to 20 metres, complemented by mild currents. Access is by boat only. The site is also available for night diving. Hazards include the presence of sharks and jellyfish; divers should scan the water before entry and maintain distance from sharks. Species recorded around this area include various wrasses, groupers, lionfish, moray eels, and triggerfish, alongside invertebrates such as octopus and ghost pipefish.

Fantasea Reef at Koh Bon features a diverse topography including a wall, pinnacle, and reef terrain. The site extends from the shallows to a maximum depth of 40 metres, with an average depth of 15 metres. Divers access the site via boat, 200 metres from shore. Conditions generally feature mild currents and visibility between 20 and 40 metres, though currents can strengthen unexpectedly at depth. Water temperatures typically range from 27 to 30C, although the Green Monster phenomenon may occasionally bring cooler, nutrient-rich water. This site is suited for advanced divers due to the potential for strong currents and depth requirements. Night diving is available, offering a different perspective on the reef structure.

Whaleback Rock at Koh Bon is a reef and pinnacle site offering depths between 5 and 20 metres. This location is accessible only by boat and is suitable for beginner divers. Underwater conditions are generally mild, with visibility ranging from 10 to 30 metres. Water temperatures remain consistent throughout the year, typically between 28 and 30 degrees Celsius. Divers should be aware of potential hazards including boat traffic, jellyfish, sea urchins, and sharp coral. Facilities available at the site include equipment rental, air fills, and guided tours.

Turtle Rock at Koh Bon is a reef dive characterised by mild currents suitable for beginners. The site features depths ranging from 10 to 30 metres, with an average depth of 15 metres. Access is by boat only, and divers should remain mindful of sharp coral and boat traffic. Visibility typically spans 10 to 30 metres, though a phenomenon known as the Green Monster may reduce visibility and lower temperatures below 15 metres. The site is available for night diving, which offers a different perspective of the reef structure. Divers are advised to monitor their depth and stay close to their guide throughout the 50-minute typical dive duration.

Beacon Point is a challenging wall dive located at Koh Bon, Thailand. The topography features a steep drop-off starting at 6 metres and extending to 55 metres. Divers encounter strong currents that can shift direction along the wall, requiring careful monitoring of position and air management. The site is suitable for advanced divers due to these conditions and the depth profile. Access is by boat only. Visibility typically ranges from 15 to 40 metres, and water temperatures remain between 26 and 30C. Night diving is permitted at this location. Divers should maintain distance from the wall to avoid contact with sharp coral and rock.