We climbed Diamond head. Well, almost all the way to the top. There were so many people at the top trying to squeeze through a single trail, we gave up.. After lunch at the bottom of the crater, we drove along the shore and stopped at the Halona blowhole. After some sightseeing, we drove a bit further up the coast and stopped at the beach next door and suntanned while watching some surfers for a few hours. Then drove up some more coast line for sightseeing.