Lifou is made up of two main islands - Lifou Island and Tiga Island- in additional to a number of uninhabited islets. Lifou Isand is the largest atoll in the world. The island is actually made of fossilized coral - known as a makatea. Lifou island does not have any surface water and it relies on a freshwater reservoir accessed by caves. Lifou Island is best known for its vast atoll (the largest in the world). This ring-shaped coral reef affords some of the best snorkelling in the world. Popular activities on this island include scenic walks, relaxing days on the beach, swimming and snorkelling. There are no organized tours being offered during this call to Lifou Island, guests may explore on their own.