Dolmens are ancient stone structures typically consisting of two or more vertical stones supporting a large horizontal stone slab. They are often associated with burial practices and are found in various parts of the world, particularly in Europe and Asia. These megalithic structures date back to the Neolithic and Bronze Ages, serving as tombs or ceremonial sites. The construction of dolmens involved significant effort, as large stones were quarried and transported to specific locations. Many dolmens are aligned with astronomical events, suggesting they may have had ritualistic or cultural significance for the communities that built them. Examples of dolmens can be found in regions like Ireland, France, and Korea.