Taff's Well is a semi-rural village, community and electoral ward located at the south easterly tip of Rhondda Cynon Taf, 6 miles (9.7 km) to the north of Cardiff, the capital city of Wales. Known locally as the 'Gates to the Valleys', it is separated from Gwaelod-y-Garth by the River Taff. Taff's Well is distinguished because it contains the only thermal spring in Wales. The tepid water is thought to rise along a fault-line from the Carboniferous Limestone, in somewhat similar manner to the warm springs at Bristol and Bath. Various religious groups regard it as a spiritual site.

The South Wales Valleys are a group of industrialised peri-urban valleys in South Wales. Most of the valleys run north–south, roughly parallel to each other. Commonly referred to as "The Valleys", they stretch from Carmarthenshire in the west to Monmouthshire in the east; to the edge of the pastoral country of the Vale of Glamorgan and the coastal plain near the cities of Swansea, Cardiff, and Newport.