It is one of the greatest mysteries of the prehistoric world: why did people on nearly every continent erect giant standing stones? According to Ancient Astronaut Theorists, the placement of these monoliths and their geological makeup could point to extraterrestrial intervention--and. quite possibly, a technology that once existed on Earth far more advanced than our own.
Avebury Stone Circle
United Kingdom · Neolithic British
The largest megalithic stone circle in the world — larger than Stonehenge
Callanish Stones
United Kingdom · Neolithic British
Ancient Aliens suggests the Callanish Stones were erected as alien markers or navigation points for extraterrestrial visitors. The precise geometric alignment and astronomical properties are attributed to advanced alien knowledge rather than human engineering.
Carnac Stones
France · Neolithic Breton
Over 3,000 standing stones arranged in perfect rows over 2 miles
Menhirs of Carnac
France · Neolithic British
Ancient Aliens proposes the thousands of aligned standing stones at Carnac were placed as alien markers or communication devices spanning miles across the Breton landscape. The precise rows are interpreted as evidence of non-human intelligence directing their placement.
Stonehenge
United Kingdom · Neolithic British
Bluestone circle served as an alien portal to transport beings to the stars