Wast Water (Wastwater) is England's deepest lake, it lies over fifty feet below sea level from its gorgeous mountain top shore in serene Wasdale. The lake was formed by a melted glacier and is to this day filled by ice cold glacier run-off. Precariously set between two mountain ranges in a sunken valley, to the south east are the Wastwater Screes, shortened by the locals to The Screes, and to the north west the cliffs of Buckbarrow and Yewbarrow.