This "lagoon with a lagoon" is a popular excursion. The water is sensationally blue and fringed by white sandy beaches and coconut trees. After an hour's boat ride from Avatoru, the captain anchors off a small island and guests walk across a seabed strewn with coral (reef shoes required), past a few harmless black-tipped reef sharks, and over the island itself to reach the blue lagoon. The seabed is soft and sandy and the views are magical, but the snorkeling, unfortunately,
is nothing special.