Carrowmore Megalithic Cemetery is one of the largest and oldest burial sites in Ireland, located near Sligo. It dates back to around 4000 BC and features over 30 passage tombs, which are large stone structures used for burial and ceremonial purposes. The site is part of the Celtic heritage and offers insights into the prehistoric communities that once inhabited the region. The cemetery is characterized by its unique stone structures, including dolmens and cairns, which are often aligned with astronomical events. Visitors can explore the site and learn about the ancient rituals and beliefs of the people who built these impressive monuments, making it a significant archaeological and cultural landmark.