Vatnajökull (meaning Glacier of Rivers) is the biggest Icelandic glacier, and one of the largest in Europe.
It is located in the south of the island and covers more than 8 percent of the country.
With an area of 8,100 km², it is the largest ice-cap in Europe by volume (3,100 km³).
It is the second largest in area after Austfonna on Nordaustlandet, in Norway.
The average thickness of the ice is 400 m (1,300 ft), with a maximum thickness of 1,000 m (3,300 ft).
Iceland's highest peak, Hvannadalshnúkur (2110 m / 6921 ft), is located in the southern edge of Vatnajökull.
There are several volcanoes under this ice-cap, as is the case with many of the glaciers in Iceland.
On 7 June 2008, it became a part of the Vatnajökull National Park.
Reference: Wikipedia