This is what many people visualise when imagining a Polynesian paradise: a string of motu and coral reefs has formed a natural pool on the edge of the main reef, a lagoon within a lagoon. You can walk knee-deep across a (mostly dead) coral seabed to visit a bird island and laze on incredibly photogenic spits of white-and-pink coral sands. This intimate paradise is reached only on lagoon-excursion boats from Avatoru, about an hour away.