This is Hawaii’s only water park, and it’s a pretty decent one. It’s located in Kapolei, which is quite far from town, but it’s still a nice place to spend a day – safe, clean family fun. General admission is about $35, which, imo, is rather pricey. However, it has many water slides and pools and other activities, and a day can be satisfyingly and easily spent here. Sometimes the lines are rather long and it can get rather crowded. Also, the fun wears off after repeat visits, but you should definitely visit at least once.