The National Parks of Sumatra are one of the last bastions for the endangered Sumatran Tiger, as well as Javan rhino, Asian elephants and the orang-utan. You can stay in small eco lodges, from where you can do day walks into the reserves in search of the wildlife. The more intrepid can travel into the Parks and camp for a night or two of old fashion exploration. You can also enjoy rafting and boat trips on the river, an excellent way of silently spotting the many animals and birds.
In the centre of the Island you can visit Lake Togo (see map), a body of water filling an ancient caldera of a super volcano. It is the largest lake in Indonesia and the largest volcanic lake in the world. Its eruption c.74,000 years ago was the biggest volcanic event for 25 million years and had cataclysmic consequences for life on earth. The island in the lake is home to the Batak people.
The west coast can offer you a beach stay on several small islands, offering unspoilt and private beaches with superb snorkelling and diving options.