References and links to information about Ley Lines:
1. Occultopedia: http://www.occultopedia.com/l/ley_lines.htm
2. Wikipedia: http://en.wikipedia.org/wiki/Ley_Lines
3. Radford, Benjamin. The Lore and Lure of Ley Lines, November 19, 2013: http://www.livescience.com/41349-ley-lines.html