第一天：Polynesian Culture Center & Circle island (Dole Pineaple Plantation, Shark's Cove)
if you don't see the night show and have dinner inside, then you only need half day for PCC.
Shark's Cove is a very beautiful place for snorkeling, the water is a lot better then Haunauma Bay. (locals go there to snorkel, Haunauma Bay is for tourist).You have to start early on this day.It will be a long day, but it should be the best day for your whole trip.
第二天: Pearl Harbor, Diamond Head, Kailu Beach, Byodo-in Temple.
Kailua Beach is a must,as it is the one of the most beautiful beach in the world. The sand is soft like silk. Bring your jacket, sometimes it gets quite windy.It is also a good beach to go Kayaking. On the way to Kailua beach, you also can stop visit Pali Lookout. (Diamond Head is for tourist).
All of above are based on my personal interest and experiences.
Welcome to paridise, and have a safe and fun trip!