Danau Toba has been part of traveller folklore for decades. This grand ocean-blue lake, found up among Sumatra’s volcanic peaks, is where the amiable Christian Batak people reside. The secret of this almost mythical place was opened up by intrepid travellers years ago. While these days Tuk Tuk – the knobby village on the lake’s inner island – is on the beaten Sumatran overland path, it's still one of the undisputed highlights of central Sumatra.
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