In the Celtic world the cave was a place of myths and legends. Known as Uamh-Binn, or “The Cave of Melody”, in the common imagination it has always been linked to the Giant’s Causeway of Northern Ireland.
According to the legend, the two places are the opposite ends of an ancient bridge built by the benevolent Irish giant Fionn mac Cumhaill. While building the pathway towards Scotland, Fionn gets informed that his enemy Scottish giant Benandonner is coming to fight him. Fionn cannot withstand Benandonner’s strength, so he asks his wife Oona to help him. She disguises Fionn, dressing him as a baby and hiding him in a cradle. Then she bakes some cakes, hiding some iron in some of them, and waits for the giant’s arrival.
When Benandonner arrives, not finding Fionn, he waits for him in his house. At the same time, he tries to intimidate Oona by showing her his great power. At this point, Fionn’s clever wife offers Benandonner some iron-cakes, but as he bites into cakes, the iron he chips his teeth. Oona ridicules him for being weak, saying that her husband eats those cakes without troubles, and feeds one (without iron) to the camouflaged Fionn. Benandonner, having seen the baby’s strength, is scared to meet his father and runs back to Scotland, smashing the causeway behind him so Fionn couldn’t follow.