Mynydd Llysiau
 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.