The stone known as Llech Gronw (‘Gronw’s Stone’) can be found today on the land of a farmstead called ‘Bryn Saeth’ (‘The Hill of the Arrow’) in Cwm Cynfal (The Cynfal Valley), not far from Blaenau Ffestiniog in Gwynedd. It is said that it was found lying on the banks of the Bryn Saeth River, a tributary of the River Cynfal. It is also said that a small mound on the land belonging to a house called ‘Llech Goronwy’ is the grave of Gronw Pebr.
Read more about Gronw Pebr's grave here (Welsh-language webpage).
Click here to see a picture of 'Llech Gronw'.