Great South Wall, Dublin

Ken Meegan has added a photo to the pool:

The Great South Wall (also sometimes called the South Bull Wall) took some fifty years to construct and was finally completed in 1795. It was the world's longest sea-wall at the time of its building and still remains one of the longest in Europe.
The Poolbeg Lighthouse is located at the end of the wall.
Dublin Port 6/7/2012