The glow of the glacier, Vatnajökull. It took me three years from the time I conceived the image to the time I captured it. This was due to two things: first, the need to become familiar with expeditions into the Icelandic wilderness to capture a vantage point not accessible by anyone from anywhere; second, finding the right time for the idea to work. This image was taken in August when night has returned after months of midnight sun, and when enough sunlight remains in the astronomical twilight to create the glow in the darkest point of the night. Later into autumn and winter reduces or perhaps even eliminates the glow, any earlier in autumn and it won't be dark enough for night shots.