Tungnafellsjökull

Tungnafellsjökull, Iceland's tenth highest mountain, is located northwest of the Vatnajökull glacier and rises 1,540 meters (5,036 feet). The trek to the peak, known as Háhyrna, is reasonably straightforward and offers spectacular views. The central volcano of Tungnafellsjökull has two calderas, one of which is filled with glaciers and the other with rhyolitic lava.

Two calderas may be found on the major volcano Tungnafellsjökull, which is located immediately northwest of the huge Vatnajökull icecap. The Tungnafellsjökull glacier fills one, while Pleistocene rhyolitic lavas are found in the second ice-free caldera to the southeast. The volcano is mostly Pleistocene in age, although postglacial flank cracks on the NE side have generated youthful basalts. This volcanic system includes the major volcano Hágöngur to the SW.