Y Felin Wynt Tower Llantrisant · Rhondda Cynon Taff · Wales

Y Felin Wynt Tower stands on the hilltop of Y Graig, west of Llantrisant, reached by footpath from Heol-y-Graig. It is one of the town's best-known landmarks and is locally known as Y Felin Wynt, Hen Felin Wynt, or Billy Wynt.

The site has a long historic association with wind power. The tower was already shown as an old tower on Bowen's map of South Wales in 1729. A windmill next to the town was traditionally said to have been destroyed during a thirteenth-century battle, although the surviving structure is best understood through its later recorded fabric and map evidence. The tower remained tall through much of the nineteenth century, but by 1890 it had been substantially reduced.

The surviving structure was deliberately reshaped in the late nineteenth century. In 1893 Llantrisant Town Trust employed Gomer S Morgan, architect, to restore the ruin as a folly. The works included the addition of internal steps and broad coping stones. The present tower is a circular rubble-sandstone structure, approximately three metres high and five metres in diameter, with vertical sides and slightly battered bases constructed on bedrock. A doorway with a segmental head of narrow stone voussoirs opens on the south side. The wall tops carry large flat coping stones linked by iron straps and shaped to the curve of the tower, forming a walkway.

Inside, the rock floor is exposed. A curving flight of stone steps rises to the copings, and a ledge with stone copings sits below the wall head. Beam holes and a semi-circular recess preserve evidence of the earlier tower structure. Y Felin Wynt Tower was listed at Grade II on 1 February 1996 as a late Victorian folly created from the tower of an important early windmill.