Oahu Hawaii
O?ahu (usually Oahu outside Hawaiian and Hawaiian English), the "Gathering Place", is the third largest of the Hawaiian Islands and most populous of the islands in the State of Hawai?i. Including small close-in offshore islands such as Ford Island and the islands in Kaneohe Bay and off the eastern coast, it has a total land area of 1,545.3 km? (596.7 mile?).[1] In greatest dimension, this volcanic island is 71 km (44 mi) long and 48 km (30 mi) across. The length of the shoreline is 366 km (227 mi). The island is the result of two separate shield volcanoes: Wai?anae and Ko?olau, with a broad "valley" or saddle (the central O?ahu Plain) between them. The highest point is Mt. Ka?ala in the Wai?anae Range, rising to 1,220 m (4,003 ft) above sea level.
Source: Wikipedia
The Island of Oahu is distinguished by three of the State's nine commercial harbors - Barbers Point, Kewalo Basin and Honolulu Harbor. Barbers Point Harbor, on the leeward, westerly side of the island, is in the vicinity of the developing city of Kapolei, while Kewalo Basin and Honolulu Harbor are located on the leeward, south shore, in the only well-sheltered area available for commercial purposes.
Honolulu Harbor is the largest and most singularly important of Oahu's and the State's commercial harbors. Its success as a world-renowned port is responsible for the evolution of an ancient Hawaiian village into the State's capitol city. This city takes its name from the harbor and together, they support the island's 884,000 residents, the heart of the State's business and commercial operations, and the main tourist center.
The city of Honolulu's central business district and government offices grew around Honolulu Harbor and Kewalo Basin. This area, from the Ala Moana Shopping Center swinging around to the Sand Island industrial district, is typically dominated by intensive harbor and waterfront activities. It is characterized by Kewalo Basin's fishing, excursion and dinner cruise vessel facilities, Honolulu Harbor's cargo and passenger terminals, bunkering facilities, marine repair docks, vessel moorings and lay berths, the Aloha Tower Marketplace, the central business district and the Kakaako, Iwilei, Kapalama and Sand Island industrial complexes, A network of highways connects this waterfront area with all of the outlying urban areas.
Honolulu Harbor bears an awesome responsibility as the State's port-of-entry for nearly all imported goods - a figurative umbilical cord sustaining Hawaii's modem life. The harbor facilities supporting this responsibility are complex and myriad and make it difficult to envision the harbor's simple beginnings.
The harbor was created by freshwater flows from Nuuanu Valley which inhibited coral growth within a small, reefed basin and cut several channels through the surrounding reef. The main channel, which was the deepest, was flanked to the west by shallower outlets. Between these outflows, rose occasional spots of earth and coral - the beginnings of Sand Island.
Source