An hour by floatplane to the east of Bali, Moyo Island is a nature preserve in the Indonesian province of West Nusa Tenggara. Deer and wild boar roam the 135 square miles of jungle, but the main attractions are offshore, where Moyo’s reefs offer world-class snorkeling and diving (including wreck diving) in water of exceptional clarity. The underwater denizens include green turtles, moray eels, reef sharks, wahoo and huge tuna.