There are a few different ones on Oahu, most are good. Beach diving is aplenty also. Aina Moana State Park in Waikiki (Beach Dive) Kahe Point Beach Park aka Electric Beach (Beach Dive) Hanauma Bay (Beach Dive) If possible, and you haven`t done it, catch a hop over to Maui and charter a dive to Molokini Crater. Absolute must dive in Hawaii. Crater to 60 feet, outside rim is wall dive into the abyss. Wherever you go in the Islands, dive it like you`ll NEVER be back! Larry