Puuhonua o Honaunau National Historical Park
The huge, centuries-old temples and 15-foot walls that lie in ruins at this ancient historical site, sacred to native Hawaiians, were built by the Hawaiians to provide a sanctuary for war refugees and those who broke the kapu (taboo) laws. Palm trees wave in the ocean breeze above black rock lava edifices, and local craftspeople can be seen working on canoes or weaving as in the olden times. The surrounding Kealakekua Bay with its cliffs and spinner dolphins makes for a gorgeous backdrop.
Admission: Seven-day passes are $5 per car. Open 24/7 year-round, weather permitting.