Pu'u O Mahuka Heiau State Historic Site

Spanning nearly two acres on a North Shore bluff, the complex preserves a series of walled enclosures built from stacked rock. In addition to its ceremonial role, the site functioned as a monumental religious, political, and astronomical center. Today, a half-mile loop trail traces the perimeter of the stone ruins, with short paths branching out toward overlooks that look straight down into Waimea Valley and across the water below.