one of the largest volcanoes in Iceland near eruption. ~ Facts around the world

Katla is one of the largest volcanoes in Iceland. Its peak reaches 1,512 metres (4,961 ft)
The caldera of the Katla volcano has a diameter of 10 km (6 mi) and is covered with 200–700 metres (660-2,300 ft) of ice. The volcano normally erupts every 40–80 years. It has not erupted violently for 95 years. Its present dormancy is among the longest in known history. Katla has been showing signs of unrest since 1999, and geologists have concerns that it might erupt in the near future