"So it's on the coast of Northern Ireland. And when you go there it's like a tone of clustered columns have been all brought together. To the point where it's like giant stairs. It happened after a volcanic eruption and now you can go and walk and climb all over them."

Riley tried making hand gestures to describe what he was remembering in his head. "Along the way you can even find stones that look like huge boots. Or columns that stack like chimneys."