Ulong Channel is a high-energy drift dive located in the Rock Islands of Palau. This reef passage features a wall ranging from 3 to 20 metres in depth, with an average of 10 metres. Divers experience strong currents that funnel through the channel, requiring advanced buoyancy control to navigate safely past sharp coral formations and overhead structures. Visibility typically ranges between 15 and 30 metres. Access is by boat only, and the site is best suited for experienced divers capable of managing significant water movement. Divers should coordinate exit points with their boat crew prior to entry to account for the swift flow.

Ulong Island is a high-energy drift dive located in the Rock Islands of Palau. The site features a reef and wall system that drops to 18 metres, with an average depth of 8 metres. Divers experience strong currents, requiring advanced buoyancy control and drift diving experience. Visibility typically ranges from 15 to 30 metres, with water temperatures between 28 and 30C. Access is by boat only. Divers should remain aware of strong currents, sharp coral, and rock edges along the wall. Securing equipment is essential to prevent entanglement. It is recommended to dive on an incoming tide to manage current direction and reduce exposure to the wall.

Siaes Cave is a deep-water site in the Rock Islands featuring a combined cavern and wall system. The topography ranges from 20 to 60 metres, with an average depth of 35 metres. Divers encounter an overhead environment that requires strict decompression management and awareness of nitrogen narcosis risks. Visibility typically spans 20 to 40 metres. Access is by boat only, and the site is suited for advanced divers. While conditions are generally mild, currents can shift unexpectedly, necessitating careful tide monitoring and the use of a surface marker buoy. Penetration of the cave requires specific cavern or cave certification beyond standard advanced training.

Siaes Corner is a reef corner and drop-off located in the Rock Islands of Palau. The site features a wall that descends to 50 metres, with shallower reef structures between 3 and 20 metres. Divers encounter moderate currents that require careful management, particularly when navigating the site's swim-throughs and overhead environments. Visibility typically ranges from 15 to 40 metres. Due to the potential for accelerating currents and the presence of sharp coral, this site is best suited for intermediate divers. Access is strictly by boat, and divers should confirm current conditions with their boatman before descending to ensure a safe drift.

Shark City is an advanced wall and canyon system located on the outer edge of the Ngemelis Islands. The topography drops from 20 metres to depths exceeding 50 metres. Divers must contend with strong currents that define the site, requiring a negative entry from the boat and immediate descent. Visibility ranges from 10 to 40 metres depending on conditions. Due to the depth and potential for down currents, divers must monitor their computers closely to manage nitrogen narcosis and decompression limits. The site is strictly for advanced divers capable of handling significant current and deep water environments.

Cemetery Reef is located within the Rock Islands of Palau, offering a shallow reef environment suitable for beginner divers. The site features depths ranging from 3 to 18 metres, with an average depth of 8 metres. Visibility typically spans 15 to 30 metres, allowing for clear observation of the reef structure. Water temperatures remain consistent between 29 and 30 degrees Celsius. Access is by boat only, and divers should be aware of mild currents. Hazards include sharp coral and rocks, as well as boat traffic, requiring careful attention during ascents. Species recorded around this area include various wrasses, groupers, angelfish, and reef sharks.

Paradies Corner is a shallow, calm reef environment located 1000 metres from shore within the Rock Islands. Accessible only by boat, the site features warm water temperatures between 29 and 30 degrees Celsius throughout the year. The reef structure provides a varied habitat suitable for newer divers, though visibility can fluctuate. Divers should consult with their boat crew regarding current conditions before descending, as shifts can occur with the tides. While the site is generally accessible, checking local conditions remains essential for a safe experience.

Temple of Doom is a cave system located in the Ngemelis Islands, Palau. This site features a vertical profile ranging from 20 to 37 metres, with an average depth of 33 metres. Access is by boat only, and the site is reserved for expert divers with cave certification. Visibility is consistently 30 metres, allowing for clear navigation of the overhead environment. Divers must manage air consumption carefully and maintain strict buoyancy control to avoid entanglement and contact with sharp coral. Strong currents and boat traffic are present, requiring careful planning and monitoring during ascent. Redundant lighting is recommended for all cave entries.