Lay Lines.

Lay lines are apparent geometric and aligned invisible energy lines that lie under the Earth, and connect places of power. At some point in the distant past of The Shades of London series, precursors of The Shadow Cabinet placed eight powerful stones in certain key locations that aligned with them to create a complex system that would proform two vital jobs: helping ghosts move quickly from this world to the afterlife, and keeping the world of the living separated from the afterlife.
They may have put neolithic sites such as Stonehenge and Newgrange directly on places where these lay lines cross, connecting a staggering amount of energy to the monuments and each other. 
The places where two lay lines cross are often known as Ley Nodes, Nodes, or Nexuses, and supposedly places that magic users can tap into to gain immense magical powers. 
The phrase Lay Lines was coined in 1921 by amateur archaeologist Alfred Watkins, who identified apparent alignments of places of geographical and historical significance, such as ancient monuments, ridge-tops, and fords. In his books, Early British Trackways and The Old Straight Track, he sought to identity prehistoric trackways in the British landscape.
Watkins later theorized that in ancient times when Britain was covered in dense forests, these alignments were built in straight lines to make them easy for travelers to spot and use them, and that these lines had persisted for millenia afterwards. He would later claim that these Lay Lines existed in many countries worldwide. 
The writer John Michell revived the term Lay Lines, associating it with spiritual and mystical theories about alignments of land forms, drawing on the Chinese concept of Feng Shui. He believed that a mystical network of lay lines existed across Britain, a notion that quickly took root amongst occultists.
Trivia 
Lay Lines are also sometimes written as leylines, or Lay-Lines.
Category:The Shadow Cabinet
Category:Real life