When you first enter the World, it is through gates reminiscent of a medieval walled city. The first thing you see is the Hogwarts Express train, complete with a conductor, sitting at the platform of Hogsmeade Station.
So if you're a fan...go. It's well worth the pilgrimage. Take the Ollivander's tour -- maybe your kid will be picked for a wand trial. Snoop into every shop window; you never know what you're going to see.