This well apparently enjoyed an excellent reputation for healing. It is used for wishing, and pins are used as an offering.
NB We do not advise drinking from any of these sources.
For further information, please read Haunted Britain by Antony D. Hippisley Coxe.
There is a ghost story from around the fifteenth and sixteenth centuries that describes the ghost of a man named Gruffudd ap R ap Phylip Vychan, who killed a knight called Robinod.
For further information, please read Haunted Wales: A Guide to Welsh Ghostlore by Richard Holland.