Samosir Island, is a large volcanic island in Lake Toba, located in the north of the island of Sumatra in Indonesia. Samosir island is the largest island in the island. Lake Toba itself is the site of a massive super volcanic eruption estimated that occurred 69,000 to 77,000 years ago, representing a climate-changing event. It is the largest known explosive eruption on Earth in the last 25 million years. According to the Toba catastrophe theory, it had global consequences for human populations, it killed most humans living at that time and is believed to have created a population bottleneck in central east Africa and India, which affects the genetic make up of the human worldwide population to the present. The lake is about 100 kilometres long, 30 kilometres wide, and up to 505 metres deep. It is the largest volcanic lake in the world.
At the end, Samosir Island and Lake Toba offering magnificent panoramas named as the next big thing after Bali. Samosir island is the centre of the Batak culture and many of this people’s artifacts remain on the island. Moreover, the people believe that this island was the origin of Batak people because of there is Pusuk Buhit. Pusuk Buhit is a hill with an altitude of more than 1800 meters above the surface of Lake Toba. This hill is believed to be the universe or “Mulajadi Nabolon” or the Almighty God who revealed himself. Moreover, in this district there is Sianjur Mulamula Village which is the first village of Batak society.