Llyn Idwal into Llyn Idwal from around Cwm Idwal. One small river flows out and joins the Afon Ogwen river at Pont Pen-y-Benglog near Ogwen Cottage, immediately above the Rhaeadr Ogwen waterfall. The lake is easily accessible on foot via a 900-metre long stone-paved path from Ogwen Cottage on the main A5 road. Another path encircles the lake. Two paths lead from opposite sides of the lake to the top of the ridge close to the Twll Du (Devil's Kitchen), but these paths become rather steep in places. They lead to Glyder Fach and Glyder Fawr. There is a small pebble beach
Ffernfael ab Idwal Ffernfael ab Idwal Ffernfael ab Idwal or Ithel (died ) was a late 8th-century king of Gwent in southeast Wales. His name seems to mean "strong ankles". His father was Idwal or Ithel ap Morgan, king of Glywyssing, Gwent, and Ergyng. His father may have divided the kingdom among his sons, with Rhys receiving Glywyssing and Ffernfael, much of Gwent. (Ergyng was apparently lost to Saxon Hwicce around this time.) Alternatively, Ffernfael's brothers Rhodri and Rhys and his nephew Brochfael may have inherited in turn, but lost Gwent to Ffernfael for a time. His queen was Ceingaer. Ffernfael's death is