“Durmstrang’s got to be about the same size as Hogwarts — how are you going to hide a great big castle?” “But Hogwarts is hidden,” said Hermione, in surprise. “Everyone knows that . . . well, everyone who’s read Hogwarts: A History, anyway.” “Just you, then,” said Ron. “So go on — how d’you hide a place like Hogwarts?” “It’s bewitched,” said Hermione. “If a Muggle looks at it, all they see is a moldering old ruin with a sign over the entrance saying DANGER, DO NOT ENTER, UNSAFE.”
