Ancient Hawaiians were expert rock builders, able to construct elaborate edifices without using mortar. They formed long lines and passed stones hand over hand, and lifted rocks weighing tons with ropes made from native plants. Their feats gave rise to fantastic tales of menehune, elflike people hired by Hawaiian kings to create massive stoneworks in a single night -- reputedly for the payment of a single shrimp. An excellent example of ancient Hawaiian construction is Kiki a Ola, the so-called Menehune Ditch, with cut and dressed stones that form an ancient aqueduct that still directs water to irrigate taro ponds. Historians credit the work to ancient Hawaiian engineers who applied their knowledge of hydraulics to accomplish flood control and irrigation. Only a 2-foot-high portion of the wall can be seen today; the rest of the marvelous stonework is buried under the roadbed.