Megaliths are large stones that ancient people used to create impressive structures. These massive stones were often arranged in specific patterns for various purposes, such as burial sites or ceremonial spaces. Famous examples include Stonehenge in England and the Carnac stones in France, which showcase the skill and effort of early civilizations. These monumental stones can be found all over the world, reflecting the cultural significance they held for different societies. Some megaliths are thought to have been used for astronomical observations, while others served as markers for important events. Their enduring presence continues to intrigue historians and archaeologists today.