(Glastonbury Tor) Glastonbury is built on high ground surrounded on all sides by the Somerset Levels. In the Dark Ages, however, the Levels were marshland and Glastonbury stood proud as an island towering above them. The Tor, that dominates the countryside around Glastonbury, is said to be the entrance to Annwfn/ or Avalon, The Celtic Underworld. this is where a Celtic King, such as Arthur, would go when near to death.
Glastonbury Tor....The Tor was probably once an island, hence its identification with the mysterious Island of Avalon, a place between the worlds, where tradition says that Arthur came to be healed of his wounds and to await his recall in a time of great need.