The Leaky Cauldron appears to be a old pub on Charing Cross Road, between a Muggle bookshop and a record store. The rear of the pub, however, opens up onto a chilly courtyard and the entrance to Diagon Alley. To gain access, a witch or wizard tapped the bricks in the wall in a counter-clockwise order. A doorway to Diagon Alley then forms and rearranges itself back to the original wall after the person(s) walk through.
It was built by Daisy Dodderidge, who was the first landlady. The Leaky Cauldron was built in 1500. She said it was, "to serve as a gateway between the non-wizarding world and Diagon Alley."
In stark contrast to the grubby downstairs of the pub, there are some unexpectedly pleasant rooms upstairs where wizards and witches can stay for the night. These rooms contained comfortable beds, highly polished oak furniture, a crackling fire which was always burning in the grate to welcome the visitor to their lodgings, and a talking mirror.
- Madi Black (Summer only)