Luckily there's more like
three hubs, so you'll likely be walking through a different area nearly every time you go from one land to another... unless you're backtracking to where you've already been or attempting to avoid an area.
I like to call it the snowman hub, but we're also accepting three-ring circus or triple-threat.
EDIT: I will add, that since the central area is actually a gigantic loop, it's more like IOA or USF than many of us realize. You can walk around the entire park, and pop into Dragons or Potter, same as you would go from London to Diagon, and then back. Then continue on your journey around the giant oval around the park. You CAN cross the hub to go from Dragons to Monsters if you want, as a shortcut, something you cant do with a park lagoon if there's not a boat or a bridge. So, in a way, the park is a loop, but all the lands are Diagons.
DOUBLE EDIT: It's a loop! And two of the lands are loops too so you don't even have to backtrack to get out!
TRIPLE EDIT: While the concept art purposely doesn't convey it, the hub will have themed areas of its own, so will look different from area to area as well, to keep it from getting monotonous.
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