Frozen Lightning

Image source : David Cartier.

I love it because : of the misty-fluid look of the sky and the silhouettes of the trees. The colours are light and make for pleasant viewing.

Note : These are actually Noctilucent clouds, the highest clouds on Earth, glowing brightly in the dark of night but never seen during the daytime, they occur rarely and only at high latitudes during the early Autumn.