Blue Corner in Palau's Rock Islands is considered by many underwater photographers and fish experts to be the finest dive on the planet. Strong tidal currents funnel past the reef corner carrying schools of grey reef sharks, white-tip reef sharks, barracuda, and enormous Napoleon wrasse, and divers use reef hooks to hold position while the fish action swirls around them. The wall itself descends from a shallow 10 m plateau into the deep blue of the Philippine Sea.
Also known as Fish Head, Maaya Thila in the Ari Atoll is a submerged pinnacle that rises steeply from depth and acts as a magnet for grey reef sharks, white-tip reef sharks, and large Napoleon wrasse. Night dives here are particularly spectacular when nurse sharks and octopus come out to hunt. The strong currents that make this an advanced site are also responsible for its exceptional fish density.
Apo Reef Natural Park is the second-largest contiguous coral reef system in the world and the largest in Asia, located in the Mindoro Strait west of Palawan. The outer reef walls host thresher and hammerhead sharks, schools of bumphead parrotfish, and spectacular wall diving from 5 to 40 m. The park's isolation from intense fishing pressure means fish biomass is dramatically higher than most Philippine reefs.
Bloody Bay Wall on Little Cayman is one of the Caribbean's most spectacular wall dives, dropping vertically from just 6 m depth to over 1800 m in the Cayman Trench. The wall face is densely covered with black coral trees, sea fans, tube sponges, and barrel sponges, while eagle rays and Nassau grouper cruise the blue water alongside. Crystal-clear visibility averaging 40 m makes this a benchmark for tropical wall diving.
Castle Rock in Komodo National Park is a submerged pinnacle that rises from 40 m depth to just below the surface, generating powerful currents and upwellings that concentrate an astonishing biomass. Grey reef sharks, white-tip reef sharks, and giant trevally orbit the pinnacle while schools of bumphead parrotfish and barracuda fill the mid-water. This is one of Southeast Asia's most adrenaline-charged drift dives.
Colombia Shallows forms the upper section of the Colombia reef complex at the southern end of Cozumel and offers one of the island's most diverse fish experiences in just 8–20 m. Huge aggregations of yellowtail snapper, French angelfish, and spotted moray eels occupy every crevice in the spur-and-groove formations, and the large sandy channels between the spurs are reliable hunting grounds for southern stingray. It is equally popular for snorkelling and recreational diving.
E-6 Pinnacle off Wakaya Island in the Lomaiviti Group is an otherworldly dive site — a cluster of seamounts festooned with pink and orange soft corals, sea whips, and wire corals from 8 m to 40 m depth. Hammerhead schools are regularly encountered in open water beside the pinnacles, along with manta rays, eagle rays, and the occasional whale shark. The remote location and exposed position demand careful weather and current planning.
Elephant Head Rock (Hin Pousar) is one of the Similan Islands' most dynamic sites, consisting of a jumble of massive granite boulders that form swim-throughs, gullies, and archways between 5 m and 30 m. Strong swirling currents bring pelagics including barracuda, tuna, and reef sharks, while the sheltered crevices hide enormous sea fans and juvenile fish life. It rewards exploratory, relaxed diving from multiple angles.
The German Channel is an artificial passage dredged by German phosphate miners in the early 1900s, now famous as one of Palau's most reliable manta ray cleaning stations. Reef mantas glide to the cleaning bommie at 20–24 m while divers rest on the sand and observe from below, and the channel walls on either side host dense gorgonian gardens and resident bumphead parrotfish schools. The site also has excellent macro life including various nudibranch species.
Manta Alley at the southern tip of Komodo Island is a channel where resident reef mantas and occasional oceanic mantas glide along the bottom in 12–25 m of water, feeding on plankton swept in by tidal currents. The site has an unhurried, intimate feel compared to more exposed Komodo sites, and the relatively sheltered position means dives can often proceed when other sites are too rough. Leopard sharks rest in the sandy gullies between coral heads.
Located on the outer reef of South Malé Atoll, this channel is a renowned manta ray cleaning station where reef mantas gather in impressive numbers to have parasites removed by resident cleaner wrasse. Divers kneel on a sandy ledge at around 12 m and watch mantas pirouette overhead repeatedly, sometimes for 45 minutes. The site is best visited between November and April when the northeast monsoon brings plankton-rich water.
Manta Sandy is a broad sandy plateau near Arborek village in Raja Ampat where oceanic manta rays gather at a cleaning station most mornings. The mantas hover motionless above the sand in just 8–15 m of water, allowing extended, unhurried observation and photography. The surrounding seagrass beds are home to nesting sea turtles and walking epaulette sharks.
Molokini is a partially submerged volcanic crater 4 km off Maui's south coast that forms a natural protected amphitheatre with flat-calm water and visibility regularly exceeding 30 m. The inner crater slopes from 5 to 25 m and is home to white-tip reef sharks, eagle rays, and a remarkable density of Hawaiian reef fish including endemic species found nowhere else on Earth. The outer back wall drops 100 m and is reserved for experienced divers.
Palancar Reef stretches for more than 5 km along Cozumel's southwestern coast and is widely regarded as one of the finest reef systems in the entire Caribbean, recognised as a UNESCO Biosphere Reserve. Palancar Caves is the most spectacular section, featuring a canyon of huge coral pinnacles and swim-throughs at 10–40 m that shelter black grouper, loggerhead turtles, and queen angelfish. The gentle drift current makes navigation effortless and visibility often exceeds 40 m.
Raggie Cave — also called the A-Frame — lies on the western rim of False Bay near Miller's Point and is Cape Town's most iconic shark dive, where ragged-tooth sharks gather in an undercut rocky cavern at around 18–22 m from April through September. The cave's natural amphitheatre regularly holds five to fifteen raggies resting motionlessly, an unforgettable sight in the characteristically green Cape water. The surrounding reef offers kelp forest, pyjama sharks, octopus, and nudibranchs for those who venture beyond the cave entrance.
Santa Rosa Wall is Cozumel's most thrilling drift dive — an almost vertical wall beginning at 7 m that plunges past 40 m with massive purple sea fans and tube sponges projecting into the blue. The incessant current keeps the water crystal clear and nutrient-rich, and the resident hawksbill turtles are so used to divers that they simply carry on grazing the sponge-covered wall. Eagle rays and black tip sharks appear regularly in the open water off the wall.
Big Brother and Little Brother are two remote limestone pillars rising from the deep Red Sea, accessible only by liveaboard. Their sheer walls are plastered with pink and orange soft corals and attract oceanic species rarely seen in shallower sites, including thresher sharks, hammerheads, and silky sharks. The north plateau of Big Brother also hosts two impressive wreck dives — the Numidia and the Aida.
Thunderbolt Reef off Port Elizabeth (Gqeberha) in the Eastern Cape is a rocky pinnacle system rising from 27 m to within 8 m of the surface, best known for its dense seasonal aggregations of ragged-tooth sharks from June to October that circle the reef in open water rather than caves, giving superb photographic opportunities. The reef structure supports large schools of baitfish, yellowtail, and bronze bream, attracting Cape gannets diving from above and dusky sharks below. Visibility in the Agulhas-influenced water averages 8–15 m and water temperature ranges from 15–21 °C.
The Elbow at the southern tip of Turneffe Atoll is famous as one of Belize's best current dives, where tidal flow funnels past the reef tip carrying a constant stream of horse-eye jacks, creole wrasse, and spotted eagle rays. Nurse sharks rest on sandy ledges at 20 m and great hammerheads are reliably sighted here in late winter. The drift is exhilarating on a strong tide and very manageable on neap tides.