This incredible photo by Stéphane Vetter—featured as NASA's astronomy picture of the day—makes my head spin a little bit. The weirdly shaped clouds—a glowing tentacle! a spaceship!—combined with the curved aurora that seems to be coming from the mountain and the sun near the horizon makes the entire shot seem completely unreal.

It was taken at lake Jökulsárlón, in Iceland. Check Stéphane's beautiful work here.