Gjáin in Thjorsardalur valley is a pair of falls within a lush garden paradise nestled within a rift zone. While the waterfalls themselves are attractive, the rift zone setting is really beautiful in that it feels like you are entering a different place that contrasted from the typically dry and desolate desert highlands surrounding the area.
This is a lava area and the lava can take on such beautiful form. There are several lava caves in Gjáin and all over there is columnar basalt and volcanic tuff.
If you look closely to the left on the photo you can see people standing there on a cliff in red and blue jackets, that will give you a sense of scale
Sig Nordal 