Per Dan Ashbach, this is a rare meteorological phenomenon called a skypunch. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds, then fall downward, punching a hole in the cloud cover.
Snow flakes. In great detail.
Castlevania: Lords of Shadow/Gallery
Ohhh I love this. It was all green and beautiful in the early books but as the world starts to disintegrate it changes into this.
Pandora from Avatar by Stuck in Customs on Flickr.