The Talyllyn Railway ( ) is a narrow-gauge preserved railway in Wales running for from Tywyn on the Mid-Wales coast to Nant Gwernol near the village of Abergynolwyn .
) is a narrow-gauge preserved railway in Wales . It runs for 7.25 mi from Tywyn [ a ] on the Mid-Wales coast to Nant Gwernol near the village of Abergynolwyn .