Frozen lake at Llyn Ogwen, Snowdonia North Wales, UK.
The lake is surrounded by high mountains, including Pen yr Ole Wen and Tryfan, considered to be one of the finest mountains in Wales. Ogwen is an extremely shallow lake, with a depth of only three metres, and is around a mile long. It lies at a height of 310 metres above sea level. The lake is the source of the River Ogwen.