To the Edge of the World

Imagine a tiny island far out in the Atlantic Ocean off the west coast of Scotland. On some days, you can hardly see where the sea ends and the land begins, just a blue-grey mist of sea spray and wind-blown sand. There is nothing but ocean between there and America. And about sixty-five kilometres out to sea, one last remote outcrop of islands and sea stacks, with the highest sea cliffs anywhere in the UK - St Kilda - the islands at the edge of the world.