Indonesia has been extremely famous for the beauty of its nature. One of the aspect which can be referred is the beauty of the lakes that exist all around Indonesia. In north sumatera, the most attractive lake which has been a primary destination for all kind of tourist is known as Lake Toba.Uniquely in the middle of the lake resides a vulcanic island known as SamosirIisland. And in the island itself, If we go to samosir island, there are also two lakes inside it which made it quite unique. Those two lakes are called Lake Sidihoni and Lake Aek Natonang.