Lake Toba is a lake and supervolcano. The lake is 100 kilometres long and 30 kilometres wide, and 505 metres (1,666 ft) at its deepest point. Located in the middle of the northern part of the Indonesian island of Sumatra with a surface elevation of about 900 metres (2,953 ft), the lake stretches from 2.88°N 98.52°E to 2.35°N 99.1°E. It is the largest lake in Indonesia and the largest volcanic lake in the world.
Lake Toba is the site of a supervolcanic eruption that occurred an estimated 69,000 to 77,000 years ago, a massive, climate-changing event. It is estimated to have been a VEI 8 eruption. It is the largest known explosive eruption anywhere on Earth in the last 25 million years. According to the Toba catastrophe theory, it had global consequences, killing most humans then alive and creating a population bottleneck in Central Eastern Africa and India that affected the genetic inheritance of all humans today. However, this hypothesis is not widely accepted due to lack of evidence for any other animal decline or extinction, even in environmentally sensitive species. However, it has been accepted that the eruption of Toba led to a volcanic winter with a worldwide decline in temperatures between 3 to 5 °C (5 to 9 °F), and up to 15 °C (27.0 °F) in higher latitudes.
How to get there
From Pinang Baris Bus Terminal which is the busiest terminal in Medan Lake Toba many buses headed for about Rp. 35,000, – 40,000, -. Another option is a travel. Price range of Rp 65.000,- Rp. 85.000,- . Or it could be the car rental which range Rp.700.000,-day, Oiya, is also said to be using the train from the main railway station in the City Medanmenuju Siantar. This was followed by rental taxi heading to Parapat around Rp. 200.000, -.
It takes about 4-5 hours drive from Medan to Toba. Actually, there are two main routes to reach Lake Toba. The first is through the town of Berastagi, Medan-second through High Cliff-Siantar – Parapat. The second route is more an option because of the distance closer.