Mounds are raised areas of soil or earth that can vary in size and shape. They are often found in natural landscapes or created by human activity. Mounds can serve various purposes, such as burial sites, agricultural fields, or even as markers for navigation. In archaeology, mounds are significant as they can indicate the presence of ancient cultures. For example, the Mississippian culture in North America built large earthen mounds for ceremonial and residential purposes. These structures provide valuable insights into the social and religious practices of past civilizations.