Danau Toba, Parapat, Parapat, North Sumatra
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Samosir, or Samosir Island, is a large volcanic island in Lake Toba, located in the north of the island of Sumatra in Indonesia. Administratively, it is governed as 6 of 9 districts within Samosir Regency. The lake and island were formed after the eruption of a super volcano some 75 000 years ago. The island was originally connected to the surrounding caldera wall by a small isthmus, which was cut through to aid navigation.