Lighthouse is located at the southern tip of Koh Rong Samloem and offers the deepest diving in the archipelago. This site features a reef that extends to depths of 45 metres, with an average depth of 25 metres. Due to the significant depth, variable currents, and potential for low visibility, this site is strictly for advanced divers. Access is by boat only. Divers should be prepared for changing conditions, as tidal currents can be strong. The topography is defined by a reef structure that drops away into deeper water, requiring careful buoyancy control and awareness of the environment.

Castle is a reef dive site located off Koh Rong Samloem, named for its resemblance to an ancient castle when viewed from the west near the local Navy base and lighthouse. This site is suitable for all experience levels, with depths reaching up to 14 metres. Access is by boat only. Divers can expect mild currents and visibility ranging from 5 to 25 metres. Water temperatures are warm, consistently between 29C and 31C throughout the year. Due to the nature of the location, divers should remain aware of boat traffic in the area.

Crabby is a reef site located off Koh Rong Samloem, Cambodia, offering an approachable environment for beginner divers. The site features depths ranging from 5 to 12 metres, with an average depth of 8 metres. Access is strictly by boat, and divers should be aware that conditions can vary, with visibility fluctuating between 5 and 25 metres. While the current is generally mild, the site is subject to strong currents at times, requiring careful buoyancy control and proximity to the boat exit point. Water temperatures remain warm throughout the year, typically between 29 and 31 degrees Celsius.

Cobia Point, located off Koh Rong Samloem, offers a varied underwater experience combining reef and wall topography. Divers can expect depths between 10 and 20 metres, with an average depth of 15 metres. Access is exclusively by boat. While conditions typically feature mild currents, they can strengthen, making this a site that requires careful planning and adherence to drift diving protocols. Visibility ranges from 10 to 30 metres. Divers should remain vigilant regarding boat traffic during ascent and descent, and monitor their depth closely due to variable visibility. The site is suitable for intermediate divers who are comfortable with drift conditions.

Nudibranch Heaven is a shallow reef site located off Koh Rong Samloem, Cambodia. The site is suitable for beginners, with an average depth of 8 metres and a maximum depth of 10 metres. Access is by boat, and divers should remain aware of boat traffic in the area. Conditions are generally mild, with visibility ranging from 6 to 25 metres and water temperatures between 29 and 31C. The site is also available for night diving, with typical dives lasting around 45 minutes. The reef environment supports a variety of marine life, though specific species observations are not confirmed for this location.

Victoria's Secret Garden is a reef and drift dive site located off Koh Rong Samloem. The site is suitable for beginners, with an average depth of 8 metres and a maximum depth of 10 metres. Divers access the site from the shore. Conditions are generally mild, with visibility ranging from 5 to 25 metres and water temperatures between 29 and 31 degrees Celsius. The site supports night diving, with typical dives lasting approximately 42 minutes. Guided tours are available through local dive shops.

Lazy Beach (Left) is a shallow reef site located off Koh Rong Samloem, Cambodia. The site features a consistent depth of approximately 4 metres, making it suitable for beginner divers. Access is available via both shore and boat, though a boat is required to reach the specific reef area. Divers should be aware of potential hazards including jellyfish and sea urchins. On-site facilities include a dive shop, equipment rental, air fills, and guided tours, alongside amenities such as showers, toilets, and a rinse station. The water temperature at this location typically ranges between 29C and 31C throughout the year.

Lazy Beach Point is a shallow reef located 1000 metres off the coast of Koh Rong Samloem. With depths ranging from 3 to 10 metres and mild currents, the site is well suited for beginner divers. Visibility fluctuates between 5 and 25 metres, and water temperatures remain warm between 29 and 31C. Access is exclusively by boat. Divers should maintain neutral buoyancy to avoid contact with sharp coral and rocks. Species recorded around this area include wrasses, anemonefish, butterflyfish, nudibranchs, and various invertebrates. Facilities at the location include a cafe and showers for post-dive use.