Pu’u O Mahuka Heiau is located on the Northshore of O’ahu. It is the largest Heaiu on the island and overlooks Waimea Bay and Waimea Valley. There is a very small hike that goes around the heiau and to the edge of the cliff.
Warning: Things like heiau are considered kapu. Do not touch, climb on, or move the rocks (don’t even wrap them in ti leaves).