One thing I don't understand is why does the covered area extend into Diagon Alley!? In the films and even the concept art it is not this way. In the concept art, the covered area is only after you walk to the right, passing the Weasley’s shop. Here are pictures to better explain things: The yellow circles are the covered area near the exit of the Gringotts attraction. The blue is the Weasley's shop, and the black is the area in question. It seems to extend from the yellow circled covering ACROSS the Diagon Alley pathway