thumbnail The circular castle of Cornwall
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The circular castle of Cornwall © Robert Harding/Alamy
Many generations watched fog roll over this countryside long before the bellicose Norman visitors who built this fortress got the chance. The peninsula of Cornwall has been populated since the Mesolithic period 10,000 years ago, and is one of the traditional Celtic nations—areas of the British Isles and France where the Celts" culture survived Roman, Norman, and other outside influences despite repeated attempts at incursion.