And Potter aficionados need only pack their imagination if they come here. Take, for example, the 66 “closes” (or alleyways) off the Royal Mile from Edinburgh Castle. The narrow, medieval passages lead to gardens, ornate houses, old tenements, shops and pubs. It’s easy to imagine them as the fictional Diagon Alley, where Harry and his friends would get candy, books, owls or wands. Speaking of wands: The city is riddled with mountain ash trees (or rowans), a branch of which purportedly wards off witches.

Did Rowling’s inspiration sometimes wander more afield? Did, for example, the onetime fishing village of Newhaven on Edinburgh’s north coast spark the literary creation of Harry’s nemesis, the evil Lord Voldemort? In the novels, his name was never to be spoken — just as, among superstitious Newhaven fishwives in the 19th century, the names of people or animals considered bad luck could never be uttered.