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.

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.

Sand Bar is a reef dive located within the Rock Islands of Palau, offering a manageable depth range of 4 to 13 metres. This site is accessible by boat and suits beginner divers. Visibility typically ranges from 6 to 18 metres. Divers may encounter whitetip reef sharks, giant morays, leaf scorpionfish, Clark's anemonefish, various wrasses, spotted garden eels, sea stars, moon wrasse, soldierfish, bigeyes, and sea cucumbers. Currents are variable, so consult your boat crew regarding conditions before entry. Water temperatures remain warm between 28 and 30 degrees Celsius, making a 3mm shorty or full suit appropriate for the typical 45-minute dive duration.

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.

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.

Blue Holes in the Ngemelis Islands features four large openings in the reef top that funnel light into a cavern system. Divers typically enter at 25 metres and exit through the wall face between 25 and 35 metres, where the structure transitions into a vertical reef edge. The site is suited for intermediate divers, with visibility ranging from 10 to 30 metres. Water temperatures remain consistent at 29 to 30C. Due to the overhead environment, significant vertical drops, and potential for strong currents, careful buoyancy control and depth monitoring are essential. Boat access is required, and divers should be aware of boat traffic upon surfacing.

Blue Corner is a prominent reef and wall site located on the edge of the Ngemelis Islands reef system. The topography features a dramatic drop-off starting at 8 metres and extending to 30 metres. This site is defined by strong currents, which necessitate the use of a reef hook to maintain position. Divers should be prepared for deep conditions and boat traffic, requiring the use of a surface marker buoy during ascent. With visibility ranging from 15 to 40 metres and water temperatures between 29 and 30 degrees Celsius, this site is suited for intermediate divers capable of managing significant water movement.