Plynlimon

Plynlimon, or Pumlumon in Welsh (also historically anglicised as Plinlimon, Plynlymmon or Plinlimmon), is the highest point of the Cambrian Mountains in Wales (taking a restricted definition of the Cambrian Mountains, excluding Snowdonia, the Berwyns and the Brecon Beacons), and the highest point in Mid Wales. It is a massif that dominates the surrounding countryside and is the highest point of Ceredigion.

The highest point of the massif itself is Pen Pumlumon Fawr, which is 752 metres (2,467 ft) above ordnance datum. Its other important peaks are Pen Pumlumon Arwystli, Y Garn, Pen Pumlumon Llygad-bychan and Pumlumon Fach. Bryn yr Ŵyn, or 'hill of the lambs', is a former Dewey in the foothills.

The longest river in Britain, the River Severn, has its source on the mountain, as do the rivers Wye and Rheidol.

Folklore says there is a sleeping giant in Plynlimon.