The Magic Oak (Pagan Oak) is disputably at or near the centre of one such circle of choirs. There is so much contradicting information and speculation surrounding the Circle of Perpetual Choirs that I dare not venture into even attempting to provide factual information on this topic.
Below is a map by a local resident Madan (also a commenter on this weblog) that was left in the gnarled roots of the oak tree near Ragged Stone Hill.
Map depicting the 'Circle of Perpetual Choirs'
For further information I would also highly recommend Awugabunnies, which features a wealth of information and detailed research into sacred geometries, including the Circle of Perpetual Choirs.
I would like to thank both Geoff and Madan for there comments on this post, and urge you to take a look.