We visited several National Park Sites while we were in Hawaii, and the kids earned Junior Ranger badges at each. On the northwest edge of the island, Pu'ukohola Heiau National Historic Site protects the ruins of the last major ancient Hawaiian temple
and the home of King
Kamehameha I, who united the islands under his rule.
Kaloko Honokohau NHS protects the site of an ancient settlement. Ruins of early fish ponds & petroglyphs still remain in this historic beachside wildlife refuge. It's located north of Kona town and south of the airport.
Pu
Uhonua O Honaunau National Historic Park, south of Kona town, preserves the site where, up
until the early 19th century, Hawaiians who broke a kapu (one of the
ancient laws) could avoid certain death by fleeing to this place of
refuge. We were planning on spending a day at the Hawaiʻi Volcanoes National Park, but ended up having to fly back early.