The Carnac Stones are a collection of over 3,000 ancient standing stones located in Brittany, France. These megaliths date back to the Neolithic period, around 4500 BC, and are arranged in various alignments and formations. The purpose of these stones remains a mystery, but they are believed to have been used for ceremonial or astronomical purposes. The site includes several groups of stones, with the most famous being the Menec, Kermario, and Kerlescan alignments. The stones vary in size, with some reaching up to 6 meters tall. Today, the Carnac Stones attract many visitors and researchers interested in prehistoric cultures and megalithic structures.