diamond head
the zoo
the aquarium
the big outdoor market
the dole pineapple plantation
whale watching
visit the uss Arizona museum
some of the hotels have luaus with authentic hula dancers
visit turtle beach
take a bus tour of the island
visit the Buddhist temple
If you_re in Kona, have lunch/dinner at Quinns Almost by the Sea. Go parasailing with UFO Parasail. Go swimming with the dolphins at the Hilton resort.
Kick back and relax. Spend time relaxing on the beach.