See Fiji's Kadavu Island by drone in this stunning, 4K video by world traveler, top AirVuz contributor, and drone pilot Jturner. Kadavu is the fourth largest island in this South Pacific island nation, measuring out at about 411 square km (around 160 square mi.). It is the largest island of the Kadavu Group, a volcanic archipelago on the Great Astrolabe Reef. About 60 km long (around 37 mi.), Kadavu is nearly sliced in half; only the very narrow Namalata Isthmus connects the two halves of the island.