When this stone circle was being excavated by archaeologists an old woman in the area who was renowned for psychic powers happened to be on her way home from Limerick. She stopped at the site and immediately fell into a trance. In her trance she saw men sacrificing a woman at an altar. She awoke from her trance before they actually cut the woman.
No evidence has ever been found for sacrifice at this site so maybe she was just telling people what she thought they wanted to hear.