Ystradgynlais
Appearance
Ystradgynlais is a town and former parish in the north of the Swansea Valley, in the county of Powys, Wales. It was in the historic county of Brecknockshire.[1] It has a population of around 10,585 as of 2021.[2]
Ystradgynlais was a mining town and is best known for the Ynyscedwyn Ironworks in Glanrhyd.[3]