Diamond Head, peak, 761 ft (232 m) high, along the rim of an extinct volcano, SE Oahu island, Hawaii. A prominent point in the Honolulu skyline, Diamond Head was designated a national natural landmark to protect its slopes from the commercial development along world-famous Waikiki Beach. U.S. Fort Ruger is at the northern end of the crater's floor. The crater was the site of an ancient Hawaiian burial ground.
More on Diamond Head from Fact Monster:
See more Encyclopedia articles on: U.S. Physical Geography