Sibayak

Sibayak
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Elevation 2,212 metres (7,257 feet)
Location Sumatra, Indonesia
Coordinates 3°12′0″N, 98°31′0″E
Type Stratovolcano
Last eruption 1881
The Gunung Sibayak is a small volcano overlooking the town of Berastagi in northern Sumatra, Indonesia. Although its last eruption was more than a century ago, geothermal activity in the form of steam vents and hot springs remains high on and around the volcano. The vents produce crystalline sulfur, which was mined on a small scale in the past. Seepage of sulfurous gases has also caused acidic discolouration of the small crater lake.

The Gunung Sibayak ("gunung" means mountain, while "sibayak" is a term from the Karo Batak language referring to a founding community) is relatively easy to climb and became a tourist attraction already in colonial times