May Evening, Cliffs of Moher
The Cliffs of Moher in County Clare attract over one million visitors each year. The cliffs form a line nearly 8km long and reach a height of 200m just northeast of O'Brien's Tower. The sediments that now form the rocks of the cliffs were deposited originally on an ancient seabed some 320 million years ago. The sandstones are more resistant to erosion than the siltstones and so they stick out from the cliff-face compared to the alternating layers of siltstone. This constant erosion gives the cliffs their dramatic appearance. It also creates sea stacks such as the one below O'Brien's Tower. From the cliffs there are spectacular views including the view across to the Aran Islands.