Kilmacrennan in the context of "Letterkenny"

A holy well or sacred spring is a well, spring or small pool of water revered either in a Christian or pagan context, sometimes both. The water of holy wells is often thought to have healing qualities, through the numinous presence of its guardian spirit or Christian saint. They often have local legends associated with them; for example in Christian legends, the water is often said to have been made to flow by the action of a saint. Holy wells are often also places of ritual and pilgrimage, where people pray and leave votive offerings. In Celtic regions, strips of cloth are often tied to trees at holy wells, known as clootie wells.