Done for Desktopography 2012 http://www.desktopography.net . Click on the link to see the awesome collection of nature wallpapers! You can also download several different wallpaper versions of this piece.
The image shows this idea I had about some big spaceships that use lava as their fuel or source of power. So every time they run out of gas, they have to travel to a volcanic area, drain some volcanoes and fill their tanks!
Painted with Photoshop and an Intuos tablet.