Here are some absolutes when visiting my home, the paradise island of Oahu.
If you're a snorkeler then Shark's Cove is a must. Shark's Cove is a wonderful reef located on the North Shore and is ranked twelfth most favorite place to snorkel in the world. When you look under water through your mask you'll probably scream out in Utahnese 'Oh my heck, look at the fish!' As the name implies, some white tipped reef sharks call this cove home. Not to worry though, they like to keep their distance.
Turtles are frequently seen in this cove too.
Jack Marshall travels the world with "http://www.funforlesstours.com/" target="blank">Fun for Less Tours.