Pu'u o Mahuka Heiau State Monument

Attributed to the legendary menehune, Pu'u o Mahuka Heiau State Monument is a long, low-walled platform temple perched on a bluff above Waimea; and it's the largest heiau on O'ahu. The terraced stone walls are a couple of feet high, although most of the heiau is now overgrown. It's an excellent site for a temple, with a commanding view of both Waimea Valley and Waimea Bay. West, the view extends along the coast to Ka'ena Point.

To get to the heiau, turn up Pupukea Rd at Foodland supermarket. The marked turnoff is about half a mile up the road; from there it's three-quarters of a mile in. There's a good view of Pupukea Beach Park on the drive up.