The Giant's Causeway is located in County Antrim on the northeast coast of Northern Ireland, about three miles northeast of the town of Bushmills and close to Carrick a rede rope bridge.
It was formed by volcanic basalt columns cooling in hexagonal formations.
Legend says that the Irish giant Fionn MacCool was challenged by the Scottish giant Benandonner to a duel. Fionn hides when he realises that his Benandonner is much bigger than him. Fionn's wife, Úna, disguises Fionn as a baby and tucks him in a cradle. When Benandonner sees the size of the 'baby', he reckons that its father, Fionn, must be a giant among giants. He flees back to Scotland in fright, destroying the causeway behind him so that Fionn could not follow. There are 2 versions of the legend but I like this version best.