It lies in a hilly well-wooded district above the valley of the small river Wye, a tributary of the Thames.
It is pleasantly situated in the upper valley of the Wye, in a bend of the river on its right bank below the confluence of its tributary the Irfon.
The scenery of the Wye valley, including a succession of rapids just above the town, also attracts many tourists.
Towards the end of the 11th century, when the tide of Norman invasion swept upwards along the Wye valley, the district became a lordship marcher annexed to that of Brecknock, but was again severed from it on the death of William de Breos, when his daughter Matilda brought it to her husband, Roger Mortimer of Wigmore.
RHAYADER (Rhaiadr-Gwy), a market town of Radnorshire, Wales, situated amid wild and beautiful scenery on the left bank of the Wye, about '1 m.