Twin Peaks is a reef site located at Koh Nang Yuan, Thailand, offering a shallow dive experience suitable for beginners. The site features depths ranging from 5 to 20 metres, with an average depth of 10 metres. Divers can access the reef directly from the shore. Conditions are generally mild, with visibility fluctuating between 5 and 20 metres. Marine life is diverse, with common sightings including Blue Ringed Angelfish, Bluespotted Fantail Ray, Titan Triggerfish, and various wrasses. Other frequent inhabitants include groupers, Blacktip Grouper, Blue-barred Parrotfish, Longfin Bannerfish, Golden Butterflyfish, Sling-jaw Wrasse, and Pink Skunk Anemonefish. Harlequin Sweetlips and porcupinefish are also recorded here.

HTMS Sattakut is a 48-metre-long wreck resting at a maximum depth of 35 metres, with the top of the tower reaching 18 metres. Located 800 metres from Koh Nang Yuan, this artificial reef requires boat access. Divers encounter species including rock cod, wrasses, bluespotted fantail rays, blue ringed angelfish, porcupinefish, groupers, white eyed morays, magnificent giant anemones, pink skunk anemonefish, longfin bannerfish, golden butterflyfish, sling-jaw wrasse, zoanthids, and soft coral. Conditions feature mild currents and visibility ranging from 3 to 30 metres. Due to the depth and overhead environment, this site is suited for advanced divers. Hazards include decompression, nitrogen narcosis, and thermoclines.

Bio Rock is an artificial reef located 250 metres off the shore of Koh Nang Yuan. This site features depths ranging from 5 to 15 metres, with an average depth of 13 metres. It is suitable for beginners and accessible via boat. Divers can expect mild currents and visibility between 10 and 25 metres. Marine life frequently encountered includes Titan Triggerfish, Bluespotted Fantail Ray, Blue Ringed Angelfish, and various wrasses. Other species such as Harlequin Sweetlips, Golden Butterflyfish, Pink Skunk Anemonefish, and groupers are also present. Hazards at this site include boat traffic, sharp coral, and stonefish. Water temperatures remain warm throughout the year, typically between 28 and 31 degrees Celsius.

Hin Pee Wee is a pinnacle and reef site located 2000 metres from the shore of Koh Nang Yuan. The topography consists of a primary pinnacle starting at 9 metres and descending to a maximum depth of 28 metres, surrounded by scattered large rocks. Divers should be prepared for moderate currents and visibility ranging from 5 to 30 metres. A thermocline is often present near 18 metres. Due to the depth and potential for strong currents, this site is suited for advanced divers. Access is by boat only. The site is suitable for deep, photography, and technical training dives.

Boyancy, also known as Buoyancy World, is an artificial reef project situated off the west coast of Koh Nang Yuan near Koh Tao. This site features a series of structures designed to support reef development and provide buoyancy training opportunities. Divers can explore the area at depths ranging from 5 to 20 metres, with an average depth of 10 metres. Access is by boat only, and the site is suitable for beginners. Conditions generally feature mild currents and visibility between 5 and 25 metres. Hazards include boat traffic, jellyfish, sea urchins, sharp coral, stonefish, and triggerfish. The site is supported by local facilities offering air fills, equipment rental, and guided tours.

Chumphon Pinnacle is a granite pinnacle located 25 kilometres from shore in the Northwest Pinnacles area of Thailand. The site features large granite blocks forming a small hill, including a sheer crack that allows for a swim-through. Depths range from 5 to 40 metres, with an average depth of 20 metres. This site is suitable for intermediate divers and is accessed by boat. Conditions vary, with visibility ranging from 2 to 30 metres and moderate currents. Hazards include deep water, potential entanglement, jellyfish, low visibility, overhead environments, sharp coral, strong currents, and thermoclines. Typical dive times are approximately 50 minutes.

Northwest Pinnacles at Koh Nang Yuan features a diverse topography of reefs, pinnacles, and caves. The site is accessible by boat and is suitable for beginners, with depths ranging from 2 to 30 metres and an average depth of 8 metres. Conditions are generally mild, though divers should be aware of potential boat traffic, rip currents, and surf. Visibility varies significantly from 2 to 30 metres, and water temperatures remain warm between 28 and 31 degrees Celsius. The site supports night diving and offers a 50-minute typical dive duration. Facilities including equipment rental, air fills, and guided tours are available on the island.

Red Rock is a pinnacle located 50 metres offshore in the Northwest Pinnacles of Thailand. The site features a reef, cave, and cavern system with depths ranging from 2 to 22 metres, averaging 10 metres. Divers can encounter Titan Triggerfish, Longfin Bannerfish, Pink Skunk Anemonefish, Sling-jaw Wrasse, Golden Butterflyfish, Blue-barred Parrotfish, and various wrasses. Less frequently, Blue Ringed Angelfish, Bluespotted Fantail Rays, Harlequin Sweetlips, Porcupinefish, Sixbanded Angelfish, Magnificent Giant Anemones, and White Eyed Morays are recorded. Access is by boat only. Conditions include mild currents and visibility between 5 and 25 metres. The site is suitable for beginners, with typical dives lasting 45 minutes.