Megalithic sites are ancient structures made from large stones, often used for ceremonial or religious purposes. These sites can be found around the world, with notable examples including Stonehenge in England and the Carnac stones in France. The term "megalith" comes from the Greek words for "large" and "stone," reflecting the impressive size of these constructions. Many megalithic sites date back to the Neolithic and Bronze Ages, showcasing the engineering skills of early human societies. They often feature arrangements of stones, such as dolmens and menhirs, which may have served as burial sites or markers for astronomical events.