Specific Location: Carneddau Mountains

On the edge of the Carneddau range of mountains in Snowdonia lays the deepest lake in North Wales, Llyn Cowlyd. The lake has been dammed so it is unnaturally deep, but it has given soundings of 229 feet, and has a mean depth of 109 feet. The lake is almost 2 miles long, and a third of a mile wide, with the adjacent hills dropping steeply to the lakes edges.