Elephants, gibbons, exotic birds and orangutans; sprawling forests and secluded beaches; wide crater lakes that gobble up the countryside and towering volcanoes that obscure the horizon - it's all in Sumatra.
Throw in 50 million people sharing more than 50 languages, hidden rural villages and huge urban centres with well-preserved traditions and colourful cultural codes, and you're left with an island that's strikingly beautiful and staggeringly diverse.
Where to go in Sumatra
Lake Toba, the world's largest volcanic lake, lies in a great crater. The result of a tremendous eruption 70,000 years ago, which was responsible for a dramatic change in the earth's climate - it may even caused the last Ice Age.
Meet our Sumatra experts
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