Imagine it’s twilight – you’re lying on the grass, staring in the sky and familiar shapes appear in the swirling cumulus. The clouds look like demonic marshmallows that infect the sky. They transform into amazing faces, beautiful fish, flying saucers and demons. These are some of the unknown wonders of the natural world and Environmental Graffiti decided to compile a list of 30 of the most incredible, for your viewing pleasure.