Here's why:
* Dark and macabre atmosphere: The story is steeped in a sense of dread and psychological horror. The narrator's obsession and guilt create a chilling atmosphere.
* Supernatural elements: While not overtly supernatural, the story explores themes of madness, obsession, and the power of the human mind to distort reality, which can be seen as having a supernatural quality.
* Focus on the psychological: The story delves into the narrator's mental state, exploring the themes of paranoia, guilt, and the breakdown of reason.
* Isolated setting: The story takes place in a secluded setting, emphasizing the isolation and vulnerability of the characters.
Beyond Gothic literature, "The Tell-Tale Heart" also exhibits characteristics of psychological horror and dark romanticism.