Gothic Fiction, according to Shmoop.com, is one of the easiest genres to spot. And it's also one of the most fun to explore, as long as you don't mind taking a walk on the nastier side of life. Snapped minds, crypt-like spaces, actual crypts, death and dismemberment, fear, the extremes of human behavior, a juxtaposition of the "sacred" and the "profane" – these are some of the sure signs you're in a Gothic story, or at least a Gothic moment.
(https://www.shmoop.com/study-guides/literature/tell-tale-heart/analysis/genre)