The Heart of Wales line is a railway line running from Craven Arms in Shropshire to Llanelli in southwest Wales. It serves a number of rural centres, including the nineteenth-century spa towns Llandrindod Wells, Llangammarch Wells and Llanwrtyd Wells. At Builth Road, two miles (3.3 km) from the town of Builth Wells, the line crosses the former route of the earlier Mid Wales Railway, which closed in 1962.

Craven Arms is a market town and civil parish in Shropshire, England. It is sited on the A49 road and the Welsh Marches railway line, which link it north and south to the larger towns of Shrewsbury and Ludlow respectively. The town is enclosed to the north by the Shropshire Hills Area of Outstanding Natural Beauty and to the south is the fortified manor house of Stokesay Castle.