Llyn Cwm Llwch is a small Welsh lake that is situated in the Brecon Beacons of Powys. It is associated with some rather strange legends and folklore, three of which I will discuss. The first of these legends involves a dangerous old woman. The second involves the Tylwyth Teg and an invisible island, and the third tells how an attempt to drain the lake was prevented by some kind of otherworldly guardian who appeared from the lake. He issued a warning, mysteriously invoking the token of the cat as evidence of his powers which told a rather peculiar story about the drowning of an unfortunate feline.
The Old Woman of Llyn Cwm Llwch
The old woman of the lake was said to prey upon those who were weak-minded, or who had a trusting nature and were easily led such as children. The legend tells that she used music to gain the attention of her victims and to lure them into the water where they were drowned. It may be that she was the Welsh equivalent of Jenny Greenteeth, who appears in English folklore as some kind of dangerous water hag. She may also have been and invention to deter children from playing around the edge of the lake. Whatever she was, her evil ways were motivated by her ambition to regain the beauty of her youth and to gain immortality. Apparently this could only be achieved by luring nine hundred victims into the lake to their deaths.
The Door of the Tylwyth Teg
According to local legend, the lake was the abode of the Tylwyth Teg, or the Fair Folk, who had a garden on an invisible island in the lake. On May Day every year, it was said that a doorway would appear in a rock by the lakeside. Those humans who were bold enough could pass through it into a passage, which would take them into an enchanted garden situated on the island in the lake. Although visitors to the island could clearly see the shores of the lake, the island and the garden were not visible from the lake’s shore.