I Am Fascinated By Sacred Geometry

Long story short; all the patterns, ley lines(specifically) etc are an ancient energy network that specific peoples, Pagans as they were thousands of years ago, could tap into the energy and use to fly sky ships, channelled into weapons and various other things. Places such as henges were concentrations of energy where multiple lines connected where large amounts of energy were required.
It was only a story but it's as good a theory as I've heard.