Things to Do in Sumatra, Indonesia

Sumatra stretches 1,790 kilometers from north to south with the Bukit Barisan Mountains running its entire spine at elevations exceeding 3,800 meters. Lake Toba, the world's largest volcanic lake, covers 1,145 square kilometers with depths reaching 529 meters, created by a supervolcanic eruption 74,000 years ago. The island contains 10 national parks protecting 17,500+ species including orangutans found only here. Rainforests span 50 million hectares with 600+ bird species.