Seems it has quite a story told here http://heritageofwalesnews.blogspot.com/2011/02/traditions-of-healing-wells.html
Ffynon Elian Cursing Well
Wales is full of wells associated with healing, many of medieval origin. The tradition of healing wells was reinvigorated in the 18th century partly because of the interest in spas and partly because of parish patriotism, as each parish claimed to have a well with special powers. None more so than Ffynnon Elian which was associated with hurting as well as healing.
Ffynnon Elian is sited on the Denbighshire/Caernarfonshire border, in the parish of Llandrillo-yn-Rhos and was part of a farm called Cefnyffynnon. Up to about 1775 the well was known only for its healing properties, and the parishioners even tried to promote it as a bathing place, no doubt influenced by the popularity of Holywell. In the later 18th century however, the well acquired an ambiguous reputation as a place where wrongs could be righted, and by the early 19th century it was well-known as a cursing well with numerous stories circulated of the tragedies connected with it.
The keeper of the well lived at Cefnyffynnon Farm, apparently rebuilt from the profits of the well as the keeper was paid a substantial fee to impose or retract a curse. The intended victim’s name or initials were written on a piece of slate which was then placed in the well to an accompaniment of curses and imprecations directed against the person, their property or cattle. The well worked by power of suggestion - people were understandably anxious, if not terrified, if they heard they had been cursed there and could apply to the keeper to be taken out of the well. Those who enquired if they had been cursed were usually replied to in the affirmative, and it seems that slates with every possible permutation of initials were kept at the farmhouse. Curses were invariably found and cancelled – at considerably more than the initial cost of imposing a curse.
The well resulted in a law and order problem as hundreds, if not thousands, cursed their neighbours. The magistrates seemed powerless as the well was on private property and no obvious crime had been committed. In 1828 however, the congregation of the adjacent Rehobeth Methodist Chapel took matters into their own hands and destroyed the well, planting potatoes on the spot. An enterprising villager, John Evans (alias Jac Ffynnon Elian), diverted the spring water to his own garden, opened a well and continued in business for another 30 years. Tried for fraud in 1831, he was imprisoned for six months, but continued after his release. Towards the end of his life, in the 1850s, he confessed to a minister that the well had been a hoax and became a Baptist. Jac wrote his confessions but died before they were published and is buried in the graveyard of Ebenezer Baptist Chapel. Remarkably, the spring at Ffynnon Elian has proved irrepressible, and supplies salubrious water to the nearby farmhouse. The full story of the well is available in A History of Witchcraft and Magic in Wales by Richard Suggett (2008).
Something is not right. This message is just to keep things from messing up down the road