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Oahu
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Hawaii: Koolau Range Diamond Head Hanauma Bay Oahu, Hawaii Hawaii Hawaii: Byodo-in Temple green algae Kaneohe Kaneohe Bay Wahiawa: Kukaniloko Birthstones State Monument
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Island, New Caledonia.
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Hawaii: Koolau Range
Hawaii: Koolau Range Koolau Range, Oahu, Hawaii.

Oahu

island, Hawaii, United States
Also known as: O‘ahu
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Oahu, island, Honolulu county, Hawaii, U.S. It is separated from the islands of Kauai (northwest) and Molokai (southeast) by the Kauai and Kaiwi channels, respectively. Oahu, which is of volcanic origin, is the third largest of the Hawaiian Islands, occupying an area of 597 square miles (1,546 square km), and supports the greatest number of people. Two parallel mountain groups, the Koolau and Waianae ranges, are connected by a central plateau. Tahitians established permanent settlements...

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