The uninhabited, mountainous area to the east of the big icecap Vatnajokull is called Lonsoraefi. Its southern boundaries are the valley Skyndidalur, the low mountain
Geldingafell in the north and the small glacier Hofsjokull and the uppermost part of the
valley Vididalur in the east. The whole area is carved with gullies and gorges and
coloured by many rhyolitic intrusions. It is very rich in half precious stones, such as
opals, jaspers, rock crystals, zeolites, chalcedony and mordenite.
A jeep track, which ends on the so-called
Illikambur ridge, connects the area with the main road and during summer there are daily tours
from the town Hofn in the Southeast. The Lonsoræfi is one of the most interesting and
beautiful hiking areas of the country and the hikers can choose between tourist huts or
pitching their tents on the way.
After the establishment of Europe's largest national
park, Vatnajokull, on June 7th, 2008, Lon became one of the centres
for the NP wardens.