Cadair Idris is one of Wales’s most iconic mountains, standing around 893m in height, and situated in Southern Snowdonia, overlooking Dolgellau. The three peaks are Pen y Gadair (Head of the Chair), Cyfrwy (the Saddle) and Mynydd Moel (the Bare Mountain). In the cwm half way down the mountain is Llyn Cau, supposedly a bottomless lake. There are numerous stories and legends associated with this mountain and Idris, the giant who’s seat it supposedly is.
A few of the nearby lakes – such as Llyn Mwyngul (commonly known as Tal-y-llyn lake) are reputed to be bottomless, and those who venture up the mountain at night should take heed before sleeping on its slopes. It is said that those who sleep on the mountain will awaken either as a madman or as a poet.