Palau
A 1944 blitz sank dozens of Japanese ships whose cargo holds are now coral gardens.
The freighter's bow emerges from the green at fifteen metres, its hull furred with coral. In one hold, steel helmets have rusted into a single fused mass; in another, depth charges lie lined in their racks where crewmen stacked them in 1944. A lionfish hangs motionless in a porthole.
Koror's sheltered anchorages made the lagoon a Japanese fleet harbour, and on 30 and 31 March 1944 the US Navy's Operation Desecrate One filled it with bombs, torpedoes and mines, sinking dozens of vessels in a matter of hours. They are still there, and eight decades have turned the aftermath into a layered dive ground minutes from town. The Jake seaplane rests in about twelve metres, corals over its wings and its propellers tellingly unbent; the Helmet Wreck, a ship whose name nobody knows, carries fused helmets and racked depth charges between fifteen and thirty-five metres; the tanker Amatsu Maru, Palau's deepest Japanese wreck, grows thick stands of black coral at forty. These are relics of a violent morning as much as reefs, and they are dived accordingly: full days pair wrecks to certification, exteriors first, penetration only with wreck training. Taken together, it is one of Micronesia's largest collections of Second World War shipwrecks.
Solo
History-minded divers can spend days working through the fleet, matching hulls to names and wartime roles. Each wreck is a chapter, and Malakal Harbour keeps the whole book minutes from the dock.
Couple
Pick a wreck you can both enjoy without anyone being talked into depth: the Jake seaplane sits in about twelve metres of clear water, corals on its wings and octopus in its cavities.
Friends
With mixed experience in the group, split across guided profiles and meet back on deck: one team's black-coral tanker, another's shallow seaplane, the same morning of 1944 seen from different depths.
Between dives, lunch is a boxed meal on the boat deck in Malakal Harbour's shelter, included in the standard three-dive day.
Ashore, Koror's boldest order is fruit bat soup, flying fox simmered in coconut milk with ginger; tempura reef fish is the gentler classic.

Biarritz
France
Atlantic rollers breaking below Art Deco balustrades where surfers and an empress shared the same bay.

Busan
South Korea
Korea's largest fish market runs live auctions at dawn beside city beaches and cliff temples.

Naruto
Japan
Whirlpools twenty metres across spinning beneath a bridge where two seas collide.

Kunta Kinteh Island
Gambia
The last piece of Africa many captives ever saw, and the river is taking it back.

Big Drop-off
Palau
Step off shin-deep reef into a vertical abyss that drops nine hundred feet into darkness.

Blue Holes
Palau
Four reef holes open into an underwater cathedral where columns of sunlight reach the sand floor.

Blue Corner
Palau
Hook into bare rock, hang in the current, and let the sharks come to you.

German Channel
Palau
A reef passage dynamited by German colonists for phosphate cargo, now a manta ray highway.