Lines of energy found on the surface of the earth by dowsers, and are unlike energy leys in that they do not run straight. They can be of any length from a few feet to many miles.
The term was coined by Hamish Miller and Paul Broadhurst. The Michael and Mary lines, which cross England from Cornwall to the East coast of Norfolk, are described in their book ‘The Sun and the Serpent’, and the Apollo and Athena lines that cross Europe are described in their book ‘The Dance of The Dragon’.
Other pairs of lines have been found, such as Bel and Elen associated with the Belinus Line, documented by Gary Biltcliffe and Caroline Hoare in ‘The Spine of Albion‘.
There is a tendency nowadays to refer to these long-distance polarised pairs as Dragon Lines.
(Source: British Dowsing, britishdowsing.net)