1. Sipiso Piso, Sumatra
At 120 metres, Sipiso Piso is one of Indonesia’s tallest waterfalls. Located in north Sumatra near Lake Toba, it’s a fantastic addition to any visit to the largest volcanic lake in the world. As soon as you arrive at the entrance and parking area, you’re treated to spectacular views of the waterfall from above. You can also take a 40-minute walk down to get a closer look from the various viewpoints, but be prepared to get wet. Although it’s possible to do a day trip from Medan, the capital city of Sumatra, it’s much better to take it slow and spend some time in Lake Toba. There are plenty of things to do around the lake, including watersports, visiting traditional villages, and relaxing on beaches.