The well at the world's end

When A. J. Mackinnon quits his job in Australia, he knows only that he longs to travel to the well at the world's end, a mysterious pool on a remote Scottish island whose waters, legend has it, hold the secret to eternal youth. Determined not to fly--he claims it would feel as though he were cheating--he sets out with a backpack, some fireworks, and a map of the world and trusts that chance will take care of the rest.