underwater blue holes palau |
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| navigate by keyword : adventure animals beautiful biodiversity biology blue cave cavern change climate conservation coral dark descends diving ecology ecosystem environment evolution extraordinary fish geology habitat healthy hole holes home island islandnation landscape life marine micronesia natural nature ocean pacific palau peaceful reef relaxing republic research scenery scenic science scuba sea seascape snorkeling submerged sunlight this tourism travel tropical tropics underwater vacation water wild wilderness wildlife |
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| Sunlight descends through blue holes into a submerged cavern in the Republic of Palau. This tropical island-nation is home to extraordinary marine biodiversity. |
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