Lake Toba

Lake Toba is a large natural lake in North Sumatra, Indonesia, occupying the caldera of a supervolcano. The lake is located in the middle of the northern part of the island of Sumatra, with a surface elevation of about 900 metres, the lake stretches from 2.88°N 98.52°E / 2.88; 98.52 to 2.35°N 99.1°E / 2.35; 99.1. The lake is about 100 kilometres long, 30 kilometres wide, and up to 505 metres deep. It is the largest lake in Indonesia and the largest volcanic lake in the world.