Looking down from Brennisteinsalda ("Sulphur wave"). This mountain is known as the most colorful on Iceland.
The top itself is merely a pile of pebbles, as can be seen from the foreground. In between there are lumps of massive lava that sometimes form pillars. The path to the top of Brennisteinsalda passes on this side of the lava (but behind the pillar), and a few people can bee seen on their way up.
The area is made of rhyolitic lava, which is high in silica and therefore the lava has a low viscosity and the resulting rock a light color. The colors are due to hydrothermal activity, the red and orange being due to iron, and the blue color being due to sulphur. The area is still active with fumaroles producing steam and smelling sulphur, the area had its last large eruption in 1477.
A slightly different viewpoint gave this picture: www.flickr.com/photos/ystenes/3032709707/
A shot the other way around looks like this: www.flickr.com/photos/ystenes/3076253703/