The Altar at Mookini, 2004; North Kohala, Hawaii Island. Mookini Luakini is one of the oldest and most sacred temples in Hawaii, it was also the sight of thousands of human sacrifices. Today, the ancient heiau complex is used to teach school children about Hawaiian culture. Located near the Birthsite of Kamehameha the Great, Mookini welcomes ordinary tourists only on special occasions-and then only if visitors bring a flower lei to lay upon the altar.