Islands of Adventure.
Period. The End. You're Welcome.
And be sure to eat at Mythos while you're there. It is routinely voted the best theme park restaurant in the world. I mean, the competition is a bunch of burger joints and the chicken nugget platter at "Pelican Paul's" but still, the food is outstanding, and beats the hell out of any other amusement park fare. It's also amazingly beautiful inside.