Gjáin in Thjórsárdalur is a paradise of a place. It is a ravine, or narrow valley, with waterfalls, cold springs, interesting lava formations, caves and lush vegetation. The area is an oasis in vast contrast to the surrounding areas. The River Thjórsá  flowed there in olden days forming the ravine.

The place is easy to reach in the summertime, about one and a half hours drive from Reykjavík and only a very short drive from the main road in Thjórsárdalur. It can be reached from two angles and both routes involve some hiking along footpaths or down rather steep paths.

The footpath takes you by the historic Viking farm Stöng .  Visitors should trod carefully because of the fragile vegetation which is easily susceptible to deterioration by trampling.