Knockturn Alley
Just around the corner from Diagon Alley lay a dark, twisting alleyway devoted to the Dark Arts: Knockturn Alley. It was a place that wizarding children were not allowed in, and with good reason. Not only were the wares sold there somewhat dangerous, but the wizards and witches hanging around behaved fairly suspiciously as well. From the shops and the street vendors one could purchase, among other things, shrunken heads, poisonous candles, human-looking fingernails, and Flesh-Eating Slug Repellent.