

Myvatn, Iceland
Wake up at 7 am. Sunny! We had breakfast on the terrace under a perfect blue sky. The group was ready to leave around 8:20. It was a 9 km long trail to reach the top of the caldera, 700 meters above us. Askja is indeed a large basaltic central volcano that forms the Dyngjufjöll massif. It is truncated by three overlapping calderas, the largest of which is 8 km wide and may have been produced primarily from subglacial ring-fracture eruptions rather than by ...