This thesis examines the dissemination of visions of the otherworld in the long thirteenth century (c.1150-1321) by analysing the work of one enthusiast for such visions, Helinand of Froidmont, and studying the later transmission of three, contrasting accounts: the vision of the monk of Eynsham (c.1196), the vision of St. Fursa (c.656) and the vision of Gunthelm (s.xiiex).