Mt. Sibayak (Indonesian:Gunung Sibayak), is a small stratovolcano, or also called a composite volcano. Located in northern Sumatera, Indonesia, it overlooks the town of Berastagi.
Although its last eruption was more than a century ago, the many steam vents which produce crystalline sulfur, and hot springs on and around the volcanoes prove that geothermal activity is still high there.
Sulfurous gases has also caused acidic discolouration of the small crater lake. What's interesting, we can actually go inside the cold crater lake to take pictures in it!
Although its last eruption was more than a century ago, the many steam vents which produce crystalline sulfur, and hot springs on and around the volcanoes prove that geothermal activity is still high there.
Sulfurous gases has also caused acidic discolouration of the small crater lake. What's interesting, we can actually go inside the cold crater lake to take pictures in it!