the cultural center towards the north side of the island. For a great beach go check out any of North shore or kialua beach. also try keneke's in wiamanalo <sp?> get the kialua pig plate. excellent and a ton of food for little money. the dole plantation is cool for tourists. if your going to drive to north shore (from the city) go around the windward (east) side of the island. it takes a while, but the views are worth it and there are plenty of nice beaches to stop at. haliewa has some great shops and a nice little resteraunt right accross the bridge (can't remember the name, I think it's joe's). Hanauma Bay is a must. the snorkeling is amazing, but go early the place gets really busy and you'll see more in the mornings, take an underwater camera. also try the market at the aloha stadium. it's cheap to get in and you can find the same stuff you see in the stores downtown for half the price or less. these are a few things above what was already mentioned. these are some of my favorite things on Oahu. you can also get cheap airline tickets to other islands, so go see the Volcano National park if you have the money and time, also visit the black sand beaches while you are there. just don't take the sand (bad luck). anyways, have a great time. And remeber to respect the locals. if you do that you wont have any problems (mainly North shore area).