Diamond Head Crater is a distinctive volcano landmark located at the end of
Waikiki Beach. The crater marks the edge of
South Shore Oahu. In Hawaiian, the famous mountain is called “Le’ahi”, because it resembles the forehead (lae) of the tuna (ahi).
Diamond Head Crater is a cinder cone volcano that erupted briefly during its early stages of existence.
History
British sailors mistook calcite crystals found here for Diamonds and called the mountain Diamond Head. Although Oahu’s Ko'olau Mountain Range is over 2.6 million years old, Diamond Head is estimated to be over 200,000 years old.