If you like archaeological sites this is a great stop. Easy to see, there are two giant ancient Hawaiian structures in excellent condition.
This is an interesting little state park with a great historical story to tell. Park rangers are very informative, there are short movies to watch and then of course, there's a massive heiau to see. The bay below is also a known shark hang-out, and in whale season there are lots of humpback sightings, fun to see.