Muri Beach, on Muri's lagoon on the southeast side of the island, is particularly beautiful. The shallow water has a sandy bottom dotted with countless sea cucumbers and some coral formations. Out towards the reef are four small islets or motu: Taakoka, Koromiri, Oneroa and Motutapu. Taakoka is volcanic; the others are sand cays.
AnatakitakiThe most famous of the many caves on 'Atiu, which is riddled with limestone caverns complete with stalactites and stalagmites, is Anatakitaki, also known as the 'Kopeka Cave'. A hauntingly large and beautiful cave, it is the home of the kopeka, a rare bird, similar to a swift, which lives only on 'Atiu. You must visit with a local guide.
Aitutaki LagoonAitutaki's marvellous lagoon, dotted with sand bars, coral ridges and 21 uninhabited motu (lagoon islets), is colourful and full of life. Maina Motu offers great snorkelling on the coral formations near its shore and around large powder-white sand bars. Tapuaeta'i (One Foot Island) has a lovely white stretch of beach and brilliant, pale-turquoise water.