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Samosir is located in the middle of Lake Toba.
|Location||South East Asia|
The lake and island were formed after the eruption of a super volcano some 75 000 years ago, in what was the last recorded 'supervolcano' explosion.  The island was originally connected to the surrounding caldera wall by a small isthmus, which was cut through to aid navigation.
At 630km², Samosir is also notable as being the largest island within an island, and the fourth largest lake island in the world. 
Samosir is a popular tourist destination due to the fantastic vistas it offers. The tourist resorts are concentrated in the Tuktuk area. The island is the centre of the Batak culture and many of this people's artifacts remain on the island.