*source: http://www.cliffsofmoher.ie/
O'Brien's Tower stands proudly on a headland of the majestic Cliffs. The tower was built in 1835 by local landlord Cornelius O'Brien as a viewing point for the tourists that even then were flocking to the Cliffs. On a clear day the view can extend as far as Loop Head at the southern tip of Clare and beyond to the mountains of Kerry. Look north and you might make out the Twelve Bens in Connemara (also known as the Twelve Pins) beyond Galway Bay. And unless it's visibility is very low you are almost sure to see the three Aran Islands to the west.
The Aill na Searrach wave view point is at O'Briens Tower. Aill na Searrach is the place where the 40ft wave raises it's head several times a year. Surfers can be seen surfing the wave from this point.
*source: http://www.cliffsofmoher.ie/