The story of the Well of Slaine comes from Irish legend. The Tuatha du Danann are the ancient race of Ireland. Their healer, Diancecht, enchanted the Well of Slaine so that warriors, hurt or killed in battle, could be brought there. Once their bodies were dipped in the well, they were cured and able to fight again. Their enemies brought stones and filled in the well, so it was renamed the Heapstown Cairn.
The Heapstown Cairn exists today in County Sligo.