Interesting fact:

Scratch beneath the surface beyond the bagpipes and the souvenir shops and you’ll find that deep down in Edinburgh’s old town there’s plenty of creepy stuff going on. The folk of Mary King Close were ravaged by the effects of the plague, and it was sealed off for nearly one hundred years thereafter. Since then, it has been a hive of haunted activity, and you can even take tours to the alley to experience first hand the effects of paranormal activity.