The Hound of the Baskervilles (1902) and The Sittaford Mystery (1931), two classic detective stories of the first half of the twentieth century, share more than the fact that they were both written by renowned authors of their genre. They are both set in the rough and wild landscape of Dartmoor in the South West of England, which significantly affects Christie’s crime novel. The chapter explores how Dartmoor’s background, rich in folklore, reflects in the setting of the work, and what interpretation it enables in terms of the story and the portrayal of characters. The emphasis is placed on the influence of the guidebooks published in the nineteenth century that significantly shaped the view of Dartmoor as a mysterious romanticized space, which causes fascination in the public as it gets entangled more and more into the urban lifestyle. Overall, the allusive relationship between the folk tales and the detective novels lies at the chapter’s core.