Tal-y-llyn Lake, also known as Talyllyn Lake or Llyn Mwyngil, is a large glacial ribbon lake formed by a post-glacial massive landslip damming up the lake within the glaciated valley. It is situated at the foot of Cadair Idris, in the Snowdonia mountain range of Gwynedd, Wales.
In 2009 a landscape photograph of the lake was included as an official desktop wallpaper (GB-wp3) with the release of the Microsoftoperating systemWindows 7, thus bring an image of the lake to millions of desktop PCs.
In fiction
1976Newbury Medal winner Susan Cooper used the lake as a setting for the book The Grey King. Within the lake six sleepers lie, wakened by Will Stanton playing the Harp of Gold in the book Silver on the Tree.