St Keyne's Holy Well is dedicated to the daughter of King Brychan. It is said that whoever of two newly-weds first drinks the water will gain the upper hand in the marriage. Or as the nearby plaque spells it out:
"The legend of Saint Keyne Well. Saint Keyne was a princess who lived about 600 AD. She laid on the waters of this well a spell thus described by Carew in 1602 AD—'The quality that man or wife whom chance or choice attains first of this sacred spring to drink thereby the mastery gains.'"
