Te'Nggano is South Pacific’s largest freshwater lake and occupies a large portion of the Rennell Island. It is one of the most visited tourist destinations of the Solomon Islands and has been declared as a world heritage site. The lake is surrounded by the old reefs. It comprises of coral islets and swamps on the western side and thrilling Octopus Cave on the northern side. You can see boobies, the Rennell white spoonbill, cormorants and a wide variety of other wildlife animals.