The high proportion of sandstone makes them especially susceptible to coastal erosion from the Atlantic Ocean. This erosion gives them their famous form we see today and is also in a constant state of change. The Cliffs you see one year will not be the same on your next cruise.
The Cliffs of Moher take their name from Mothair Ui Ruian (Ruined fort of O’Ruan). This fort dates back to the 1st century BC. The fort was later taken down and a signal tower was put in its place to which remains there today. This tower was one of many built along the Irish Coastlines as a warning system to thwart the threat of invaders to the West Coast. The towers were lit with fire and the signal would be passed along the stretch of coastline. The next tower can be seen across the water on Inis Oírr.
The Cliffs of Moher remain one of Ireland’s most famed tourist attractions with over 1 million visitors walking its paths in 2013. The irresistible and ever changing views of this magnificent landscape make it very easy to see why. Please note ferry services from Doolin Pier will start again on 17th March 2017 (sea condition depending).