This photograph is taken when the sun went just below the horizon, only to come back up a few minutes later. This is basically as dark as it gets up in northern Sweden for a couple of weeks around June - July.
Have a look at another photo from this sunset.
My cousin and I went up on a small mountain and captured this spectacular landscape a few years ago. I haven't been able to upload the photo because... I haven't been able to put it all together. Neither of our gaming rig-PCs could handle the sheer amount of pixels. That said, with a touch of 2011 Apple technology - it finally came to life!
This, then, is a 3-step HDR panorama with 14 photos in width. In other words, you're looking at a photograph that took 42 exposures to create. All, while mozzies ate us alive.