St Winefried’s well is located at Treffynnon. Tref = settlement; ffynnon = well or spring, so that makes sense. However, the town’s English name, Holywell, shows the reason for its inclusion as one of the seven wonders of Wales.
The spring is said to have risen where St Beuno restored to life his niece, St Winefried, after she was beheaded by a rejected suitor. As such it became a site of pilgrimage, for healing, with many notable visitors, including royalty.
The 15th century building straddles the spring. The lower, open crypt contains the well.
Above is a chapel, which from the other side is at ground level, because of the way it is built against the hillside.
Originally the spring flowed out and away down the valley. The statue stands where the stream once flowed.
Today the water is directed into a bathing pool.
The outflow was measured in the 18th century to be 7.6 million gallons of water per day. So not only was there a tourist industry, based on the pilgrimage site, but there was also thriving manufacturing industry in the short 1½ mile valley from the spring to the sea, with the stream being dammed several times to control its flow.
Close to the fresh spring, St Winefried’s brewery operated until 1930, and further downstream there were up to 19 factories. Metalworking and textiles were the main industries. There was so much activity that a railway branch line was opened in 1869.
The flow of visitors grew through the 19th century. Perhaps the poem was an effective tourist advert. However, at the same time the flow of the stream started to decrease and in 1917 it dried up completely.
This happened because mining, in the hills above the town, had changed the route of the underground stream, directing it away from the spring. Of course it couldn’t be left dry – Holywell’s thriving tourist industry would have vanished too. So another underground stream was channeled in to restore the flow.