Diamond Head, Waikiki, Hawaii, USA
Diamond Head is the name of a volcanic tuff cone on the Hawaiian island of Oʻahu and known to Hawaiians as Lēʻahi, most likely from lae ‘browridge, promontory’ plus ʻahi ‘tuna’ because the shape of the ridgeline resembles the shape of a tuna’s dorsal fin. Its English name was given by British sailors in the 19th century, who mistook calcite crystals on the adjacent beach for diamonds.
Diamond Head is a defining feature of the view known to residents and tourists of Waikiki. The volcanic tuff cone is a United States State Monument. While part of it is closed to the public and serves as a platform for antennas used by the U.S. government, the crater’s proximity to Honolulu’s resort hotels and beaches makes the rest of it a popular destination.
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