South Kona
The most significant cultural site on the Big Island — a Hawaiian Place of Refuge where kapu (law) breakers, defeated warriors, and civilians could reach safety and receive absolution from priests. The reconstructed royal grounds, carved ki'i akua (deity figures), royal fishponds, and enormous mortarless stone wall (built without metal tools around 1550) are extraordinarily well-preserved. A self-guided audio tour walks you through the site's role in Hawaiian society. The ocean setting — palm trees, ancient lava coast, crystal water — is as beautiful as any resort. Do this before or after Two Step snorkeling directly next door.
Entry $20/vehicle (valid 7 days); no per-person fee. No reservation required. Open daily. Located at the end of Hwy 160, ~25 min south of Captain Cook. Combined naturally with Two Step snorkeling directly adjacent.
Year-round. Open-air site — can be hot midday. Best in morning for cooler temperatures and better light on the site.