I wanted to make a series of indetereminate size tied to the Arthurian Mythos- best known for its story of the Holy Grail G'Rail.
Avalon is a mythical island where Excalibur was forged, and Arthur was supposedly brought to heal from possibly mortal injuries sustained from a final battle with Mordred. In the mythos, it is a land of the fae west of Ireland, and ruled by Arthur's sorcerous sister Morgan. It is believed to be based on Glastonbury Tor in southern England, a rocky outcropping that would have at one time been an island due to swamplands in the area.