Lake Toba
This largest volcanic lake measuring 1,707 sq ft is called Lake Toba, also known as Danau Toba. It is formed after a gigantic volcanic eruption about 70,000 years ago and is the world’s biggest caldera lake. Lake Toba is rumored to be a product of a massive supervolcanic eruption known as the Toba catastrophe theory which has supposedly killed many of the human population. Besides there are the Batak people here that are well known for their friendliness.