Lake Letas
 Lake Letas is the largest lake in Vanuatu located in the center of the volcanic island of Gaua of the Banks Islands in northern Vanuatu. The place submitted an application to be considered an UNESCO World Heritage Site in 2004.The lake is U-shaped surrounding Mount Gharat on all sides except southwest. It is about 9 km long (north to south) and about 6 km wide with an area of 19 km².