10Carnac Menhirs, Carnac, France

Meaning “long stones” in old Brittonic languages, menhirs dot the plains around Carnac in modern-day Brittany.

Comprising more than 3,000 individual standing stones, this is actually the world’s largest collection of its kind. Hewn from local rock, they were erected by Brittany’s pre-Celtic people and date from 3300 B.C.E. to as early as 4500 B.C.E.

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