Ley lines are alleged alignments of a number of places of geographical

Geography

Geography is the science that studies the lands, features, inhabitants, and phenomena of Earth. A literal translation would be "to describe or write about the Earth". The first person to use the word "geography" was Eratosthenes...

 and historical interest, such as ancient monument

Monument

A monument is a type of structure either explicitly created to commemorate a person or important event or which has become important to a social group as a part of their remembrance of historic times or cultural heritage, or simply as an example of historic architecture...

s and megalith

Megalith

A megalith is a large stone that has been used to construct a structure or monument, either alone or together with other stones. Megalithic describes structures made of such large stones, utilizing an interlocking system without the use of mortar or cement.The word 'megalith' comes from the Ancient...

s, natural ridge-tops and water-fords. Their existence was suggested in 1921 by the amateur archaeologist Alfred Watkins

Alfred Watkins

Alfred Watkins was a businessman, self-taught amateur archaeologist and antiquarian who, while standing on a hillside in Herefordshire, England, in 1921 experienced a revelation and noticed on the British landscape the apparent arrangement of straight lines positioned along ancient features, and...

, in his books Early British Trackways and The Old Straight Track

The Old Straight Track

The Old Straight Track: Its Mounds, Beacons, Moats, Sites and Mark Stones is a book by Alfred Watkins, first published in 1925, describing the existence of alleged ley lines in Britain....

, commenting "I knew nothing on June 30th last of what I now communicate, and had no theories". Watkins later developed theories that these alignments were created for ease of overland trekking by line of sight navigation

Navigation

Navigation is the process of monitoring and controlling the movement of a craft or vehicle from one place to another. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks...

 during neolithic

Neolithic

The Neolithic Age, Era, or Period, or New Stone Age, was a period in the development of human technology, beginning about 9500 BC in some parts of the Middle East, and later in other parts of the world. It is traditionally considered as the last part of the Stone Age...

 times and had persisted in the landscape over millennia.