Azkaban is a fictional prison in the Harry Potter series, created by author J.K. Rowling. It is located on a remote island in the North Sea and is known for housing the most dangerous wizards and witches. The prison is heavily guarded by Dementors, dark creatures that feed on human emotions, making it a place of despair. In the series, Azkaban is described as cold and bleak, with its inmates often suffering from severe mental anguish due to the presence of Dementors. The prison plays a significant role in the story, particularly in Harry Potter and the Prisoner of Azkaban, where it is central to the plot involving Sirius Black.