Bingley visited this cwm at the close of last century, and gives a good description of it.
At cwm Dyli farm they say hes gone to sell sheep; has he so?
I was hoping to get away to the left and traverse into the cwm; that too quite hopeless.
He was much impressed by Caddy of cwm Glas, the strong woman.
The harvest moon, full and golden, was rising behind the crest of cwm Dinas.
So they proceeded to the place where was the Owl of cwm Cawlwyd.
The southern side, sloping into cwm Dyli, though very steep, is much less precipitous and rocky than the other.
But of all the glories of cwm Idwal—rarities apart—the greatest, when the summer is at its prime, is the array of globe-flowers.
Other deaths have taken place in this cwm, for which see under Lliwedd and Clogwyn y Garnedd.
In Brecon a romantic gorge called the cwm Pwcca bears record in its name of the old belief in the phoca.