Avalon, a site of great power, revered since ancient times as an entrance to, and exit from, the Otherworld. The Isle of Avalon illustrates and describes the physical and sacred topography of the Isle as well as its symbols, architecture and history. This is an updated and revised edition of the first book to provide a coherent context in which to understand Avalon's many mysteries. Nicholas Mann shows that the landscape features of the Isle and Tor, including the Glastonbury Zodiac, the Abbey, the Tor Labyrinth and the St Michael Ley Line are congruent expressions of Avalon's remarkable qualities as a focus for the magical and spiritual power of the English landscape.