In 1921, Alfred Watkins (1855–1935) coined the term "ley lines" when explaining his theory that such ancient sites around Britain as various stone circles, stone groupings, burial mounds, and places of worship had been deliberately constructed to form certain alignments between and across the landscape. Except for a few isolated cases, most ley claims did not match the criteria of straight alignment, and often incorporated structures from different eras.
Neverthless, the belief that many megaliths erected by neolithic peoples were placed along energy lines persists. Others take a more practical view: such alignments could have served as signaling devices where watchers could provide advance alert miles away about approaching armies.
"Ley Lines." [Online] http://www.mystical-www.co.uk/leylines.htm. Hitching, Francis. Earth Energy. New York: William Morrow, 1984.