resort district, southeastern Honolulu (city), Hawaii, U.S. On the southern coast of Oahu island, Waikiki (Hawaiian: “Spurting Water”) is situated on Mamala Bay between the Ala Wai Canal (north and west) and Diamond Head crater (southeast). In the 19th century Waikiki was a favourite resort of Hawaii's royals, and the area was teeming with coconut groves, fishponds, and walled taro patches that extended a mile inland. In the 1920s the Ali Wai Canal was built, diverting the water that went into Waikiki and helping to expand the potential for tourism. Waikiki's beach, now a tourist mecca, is one of the best known in the world; its white sand, however, is mostly imported, because erosion constantly depletes the beachfront. Lined with luxury hotels, Waikiki beach is the focus of water-sports facilities and has an aquarium, zoo, garden attractions, and the International Market Place for Pacific Basin crafts. Waikiki is also the site of Fort DeRussy, a former fort and now a park that honours members of the U.S. armed forces; within the park is the U.S. Army Museum of Hawaii.