Mae Nak Phra Khanong ('Lady Nak of Phra Khanong'), or simply Mae Nak ('Lady Nak'), is a well-known and popular Thai ghost. Local folklore insists the story is based on actual events that took place during the early 19th century. It is a ghost story that has been told and retold for several decades. It was said that the story originated in Bangkok.

Ghost of Mae Nak Phra Khanong in Bangkok's haunted temple - Unexplained Mysteries