Spend four days exploring North Sumatra with a professional guide, starting with a city tour of Medan. You’ll drive to Lake Toba, a volcanic crater lake located in the Batak highlands, where you’ll find the 394-foot-high (120-meter) Sipiso-piso waterfall. Ferry across the lake to Samosir Island to meet the Batak people, who reveal their unique worldview. You’ll spend one day on a boat cruise to Ambarita, see the tomb of King Sidabutar in Tomok village and see the beautifully decorated houses of Dokan. Includes hotel accommodation with breakfast.