The Weasleys' Wizard Wheezes shop is a great example of how closely the park parallels the films. There's even a toy Umbridge riding her unicycle above you. At 12 Grimmauld Place, in the London area, Kreacher the house elf peeks through the window every few minutes. Knockturn Alley is kept air-conditioned separately from the rest of the park so that it feels dark and chilling. Evanna Lynch, who plays Luna Lovegood, said, "You can just walk through the books in this land." And it's true. As much as they pulled from the films in re-creating the sets, there are numerous obscure references to the original stories, as well. The attention to detail is incredible. There's a musical performance by Celestina Warbeck and the Banshees, whom Molly Weasley mentions in the books as her favorite singer. Florean Fortescue's Ice Cream Parlour is featured more in the books than the films, and there's a Crumple-Horned Snorkack in the Magical Menagerie — a reference only readers will get.
Source: 2014 Universal Orlando Resort