With Mike Buckley posting his fabulous images from his recent trip to Iceland, I thought I might post some of mine.
The one place that we really liked is the hard to access Vita explosion crater, that is part of the much larger Askja volcano. It can only be accessed a few months each summer, in the central highlands of Iceland. A 4x4 vehicle is mandatory on the roads leading to it. The picture was taken in early July, and the white patches are snow.
There is a small, warm, opaque blue, geothermal lake at the bottom. People do climb (slide?) down the walls of the crater to go for a swim, and many of the small dots seen in the water are the heads are the swimmers.