The Ysgyryd Fawr is a mountain in the Brecon Beacons National Park in Monmouthshire, south Wales. The Ysgyryd Fawr ( Skirrid Fawr Anglicized in cards as, also known as Skyrrid ) is as Holy Mountain ( Sacred Hill ) of Wales known.
He is the north-eastern of the three peaks that lie around the town Abergavenny in the Black Mountains. The ruins of St. Michael's chapel is located within an Iron Age enclosure on the 486 m high summit. On the western slope there was a series of glacial landslides. According to legend, it was created because of the mountain at the time of the crucifixion of Christ was torn.