If you're a Harry Potter fan, you'll probably be happy to know that Google is providing Street View imagery not only of the real world, but also the Harry Potter world, or at least part of it. Google Maps has imagery available from the Warner Bros. studio, including the Diagon Alley set. The studio, in London, offers tours, and now you can simply take a virtual walk down the alley thanks to Google.
Here are some of the sites you'll see:
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