The folklore surrounding barrows, stone circles and other prehistoric sites in Britain, Ireland, and Brittany suggests that local inhabitants experienced them as uncanny places where dangerous and powerful beings might be encountered. In Ireland and Gaelic Scotland, hill forts and burial mounds are home to the fairies and best avoided, while in Brittany megaliths are inhabited by korrigans who might invite you to join their revels (don’t accept!). In England and Scotland, several standing stones and dolmens were seen as places where witches gathered or that they built. The Rollright Stones in Oxfordshire have an especially rich tradition of witch folklore, and the modern occultist William Gray developed an elaborate ritual to be performed there. In this talk we’ll, explore the world of fairies, witches, and magic in the folklore of ancient monuments.