Glendalough, or the Glen of two Lakes, is one of the most important sites of maonastic ruins in Ireland. It is also known as the city of the seven Churches. Fourteen centuries have passed since the death of its founder, St. Kevin, when the valley was part of Ireland's Golden Age.The two lakes, which gave the valley its... name, came into existence thousands of years ago, after the Ice Age, when great deposits of earth and stone were strewn across the valley in the area where the Round Tower now exists. The mountain streams eventually formed a large lake. The Pollanass river spread alluvial deposits across the centre of the lake and created a divide to form the Upper and Lower Lakes. The Glenealo river flows in from the West into the Upper lake which is the larger and deepest of the two lakes.
Before the arrival of St. Kevin this valley (glen) would have been desolate and remote. It must have been ideal for St Kevin as a retreat and area to be 'away from it all'. Kevin died in 617 A.D. at the age of 120 years and his name and life's work is forever entwine with the ruins and the Glendalough Valley.