The term "ley lines" refers to hypothetical lines connecting a series of seemingly unrelated sites, such as ancient sites ranging from Stonehenge to the Great Pyramids of Egypt. The photographer Alfred Watkins first used the term to refer to the supposed alignment of sites in the British Isles.
Watkins originally proposed the lines in England represented transit routes used by ancient peoples. In contemporary use, the term often includes a mystical element. Various believers apply the term to supposed worldwide phenomena or to sites in regional areas. References to the lines appear in numerous new age and pseudoscience fields, including ufology and numerology. Some advocates of the lines claim the lines align with magnetic or mystical energy sources.