Taff's Well Thermal Spring

Taff's Well thermal spring is in Taff's Well (Welsh: Ffynnon Taf) north of Cardiff, south Wales (ST11928363) at an elevation of about 30 metres (100 ft). It is the only thermal spring in Wales. The spring emerges on the eastern bank of the River Taff and has been contained within a brick well structure. Access is via Taff's Well park, a public park owned and maintained by Rhondda Cynon Taff Council. The spring is enclosed inside a well and stone building constructed in the 19th century. The well built to contain the spring waters is brick-lined and approximately 4 metres (13 ft) deep. The building has an internal dimension of 5.3 by 3.9 metres (17 ft × 13 ft), and water fills this area. A brick-built spiral staircase is incorporated in the inside of the well. There is one visible overflow pipe, which emerges several metres to the west of the spring on the bank of the River Taff. A recent conceptual model considers that the water has journeyed from the limestone outcrops on the north crop of the coalfield over a period of at least five thousand years, but possibly ten thousand. The site is a registered Regionally Important Geological Site and a Grade II listed building.

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