This unusual rock formation is located near the lookout at the end of road 470. A signpost stands at the beginning of the path, only a few minutes' walk from Phallic Rock. According to Hawaiian legend, the history of the evolution of Phallic Rock is this. Nanahoa, god of manly fertility, who lived near the rock, stared at a beautiful young girl one day who was admiring her reflection in a pond. Nanahoa's wife, Kawahuna, came upon him and became so jealous that she started to pull the girl's hair. Nanahoa also got worked up and began to hit his wife. She tumbled down a hill and turned to stone. The same fate befell Nanahoa - he turned into stone shaped like a phallus and can be seen in this form today.
Over the years the stone became a symbol of fertility - childless women would spend a night praying at the stone to be cured of their infertility. Sometimes they would sit in one of the pools in front of the rock to catch rainwater in the hope that mana, the spirit of fertility, would come to them.