Back home, deep in rural West Cork, after it had rained on a sunny day, a rainbow invariably appeared, stretching over the Blackwater & in the direction of Youghall.
We were convinced that, if we managed to track the rainbow to it's end, we'd find the pot of gold, watched over by it's Guardian - Seamus O'Sean the Leprechaun.
(Come to think of it, some of us still believe it!!).