The legend goes that the causeway was built by an Irish giant named Finn McCool as a way to walk to Scotland in order to fight his Scottish nemesis, Bernandonner. The story goes that Finn fell asleep before he could cross to Scotland, and Bernandonner came across to Ireland looking for Finn. His wife, Oonaugh, upon seeing that the Scotsman was much larger than her husband, cleverl
y wrapped him up, and passed him off to Bernandonner as her baby. Upon seeing this enormous baby, the giant Scot, thinking that the father must indeed be a larger giant than he, went back to Scotland, tearing up the causeway as he went, to keep the giant Irishman from coming for him in Scotland. The legend made sense to people for many years, as there are similar formations across the water on the Scottish side.