Palau in 1944: Peleliu battle waters

Micronesian reefs and a jellyfish lake: Blue Corner currents, a 2009 shark sanctuary, and the Palau Pledge stamped in 2017. Palau is a western Pacific island nation whose recreational water story is the Rock Islands, a few world-famous current dives, and Ongeim'l Tketau (Jellyfish Lake). The Rock Islands Southern Lagoon became a UNESCO World Heritage site in 2012. Palau declared a shark sanctuary in 2009 and began stamping the Palau Pledge in passports in 2017.

Wow factor sits at the top of this atlas. Accessibility is low: long flights, liveaboard or day-boat logistics, and sites like Blue Corner that punish poor buoyancy in current. Risk is real because of current, boats and overhead caves, not because the lake is a decompression problem.

This chapter is a place atlas, not a certifying agency, not medical advice, and not a live briefing. Koror operators, the Palau International Coral Reef Center and the day's current override any sentence here. Destination pages are season and access notes — not a booking engine. Visa, park fees and live weather beat brochure months.