Carnac β The Alignments
Over 3,000 standing stones arranged in roughly parallel rows, stretching for miles across the Brittany countryside. The largest megalithic site on Earth. And nobody knows why it's here. The stones were erected over a period of about a thousand years, between 4500 and 3300 BCE. That's older than the Great Pyramid by a millennium. Older than Stonehenge by almost as much.
Carnac Standing Stones