"Tobar" is the Irish word for "well," so if on a quest to hunt one down, anywhere with a name that begins or ends in something like "tubber," such Ballintubber/Baile an Tobair ("the town of the well"), is bound to have one. They are mostly found close to a church or graveyard, providing easy access to holy water.
Kildare - Tobar Bride St Brigid's Holy Well In Irish mythology Brigid was the Celtic goddess of fire, poetry, unity, childbirth and healing. She was the daughter of Dagda a High King of the Tua Dé Danann. Sacred wells were always places of pilgrimage to the Celts. They would dip a clootie (piece of rag) in the well, wash their wound and then tie the clootie to a tree. generally a Whitethorn or Ash tree, as an offering to the spirit of the well.