Our penultimate stop is Aitutaki, an isolated atoll in the South Pacific. This is a radical departure from the rest of the trip: no traipsing around to a different town every night, no long list of things to do. Just a week in a beach bungalow overlooking a turquoise lagoon, luxuriating in the sunshine. There are practically no sights to see – just swims and books and naps and cocktails for a whole week.