Mynydd Llysiau is a subsidiary summit of Waun Fach in the Black Mountains in south-eastern Wales. It lies halfway between Waun Fach and Pen Allt-mawr. It is a distinguished summit with a steep eastern face.
The summit, marked by a pile of stones, is long grassy ridge. To the south is Pen Twyn Glas, before which are two boundary stones that resemble grave stones.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. .
References
External links www.geograph.co.uk : photos of Mynydd Llysiau and surrounding area