"a megalithic wonderland"
The small town of Carnac in southern Brittany is world-famous for the long rows of standing stones stretching over a mile or so in a north-easterly direction to the north of the town. Much plundered in centuries past for stone and generally getting in the way of earlier generations, these fabulous relics gained greater respect over the 20th century, and are now under State protection.
Nothing can really prepare you for the sight. While stone rows are knwn elsewhere, such as thet Merrivale stone rows in Dartmoor, England, they just aren't on the stupendous scale seen at Carnac. The area is also surrounded by a wealth of menhirs, dolmens, passage graves, making the town well worth a visit if you're interested in megalithic sites. Carnac is also blessed with an excellent beach and the Quiberon peninsula nearby caters for all sorts of sports like wind-surfing and sailing. Take a look at the staying there section for more information as to where to stay, relative to the stones and other amenities.