Location from Prisoner of Azkaban by J.K. Rowling
A derelict house on the outskirts of Hogsmeade, built to contain Remus Lupin's werewolf transformations and now the site where the truth about Sirius Black, Peter Pettigrew, and the Potters' betrayal finally comes to light.
Also known as: the Shrieking Shack, Shrieking Shack, the most haunted building in Britain