9 Incredible Stops That Will Make Your Brittany Road Trip Unforgettable

5. Carnac Standing Stones

The Carnac standing stones are one of the largest and oldest prehistoric sites in Europe, with over 3,000 megaliths (menhirs) spread across several fields. Dating back to around 4,500 BC, the stones are arranged in rows, circles, and clusters. Researchers are still unclear about their purpose. You can learn more about these intriguing structures at the nearby Musée de Préhistoire.