Raths are ancient earthen structures found primarily in Ireland, often associated with Celtic culture. They typically consist of circular enclosures made from earth and stone, serving as fortified dwellings or ceremonial sites. Raths can vary in size and complexity, with some featuring ditches or banks for added protection. These structures are believed to date back to the early medieval period, around 500 to 1000 AD. Raths are often linked to fairy folklore, as they are thought to be the homes of fairies or other supernatural beings. Today, many raths are protected as important archaeological sites.