This is the most sacred site in central Oahu. Two rows of 18 lava rocks once flanked a central birthing stone, where women of ancient Hawaii gave birth to potential alii (royalty). The rocks, according to Hawaiian belief, held the power to ease the labor pains of childbirth. Birth rituals involved 48 chiefs who pounded drums to announce the arrival of newborns likely to become chiefs. Used by Oahu’s alii for generations of births, the pohaku (rocks), many in bowl-like shapes, now lie strewn in a grove of trees that stands in a pineapple field here. Some think the site may also have served ancient astronomers—like a Hawaiian Stonehenge. Petroglyphs of human forms and circles appear on some stones.