Rhandirmwyn is a small community in the upper Tywi Valley in Carmarthenshire. The River Tywi runs a mere 500 meters from Rhandirmwyn. The town is nestled in the Cambrian Mountains and lies just south of Pen y Darren, noted for having a first century Roman fort, and to the west of Nant Gwyn.
It’s name is derived from the joining of two words, namely, ‘Rhandir,’ which means an area of land and ‘Mwyn,’ which means mineral. So, translated the name means exactly that, a piece of land that contains minerals – in this case Lead and Zinc.