The largest establishment in Knockturn Alley. It sells Dark Arts magic items, some of which are very dangerous. This is the place where Tom Riddle (aka Lord Voldemort) worked following his seventh year at Hogwarts.
Much like a pet shop, though rather than selling familiars, Creepy Critters Beast Shop sells dangerous creatures such as gigantic, live spiders. They also have their own formula of Flesh-Eating Slug repellent. Rubeus Hagrid, Hogwarts Gamekeeper, is a regular here.
A shop said to be owned and run by descendants of Morgan LeFay, which boasts such wares as poisonous candles, cursed masks, and rusted, spiky instruments. Come in and see, the LeFay sisters have a lot of interesting artifacts.
A seedy little inn found on the south side of Knockturn Alley. Who knows what sort of illegal business is conducted here but it definitely can't be good. Its a bit like a Dark Arts version of Hogsmeade's Hogs Head Pub.
Only the very dark and very evil witches and wizards venture into this part of the Wizarding World. The Alley is known for selling Dark Arts objects and Black Market items as well as many illegal products. You wouldn't want to be caught down here and even the Ministry Officials won't enter.