coliemore harbour

From Coliemore Harbour one can see Dalkey island with its famous Martello Tower. The Irish for Dalkey is Delginis, which means Thorn Island. The Danes, who had a fortress here in the 10th century, gave Dalkey its present name. Delg was changed into 'Dalk' - the Danish for thorn, and Inis into 'ey' - Danish for island.