果果兄,these are must in Oahu
1. Hanauma Bay Nature Preserve: snorkeling, need to be there early in the morning or you wont have a chance to get in.
2. Lani's Beach
3. Polynesian culture center
4. Diamond head 山上看全景
5. Northshore:海滩日落和大浪。
6. 珍珠港
check out www.hawaiiweb.com