The collection of images below is the 2015 Desktopography wallpaper exhibition. The Desktopography project arrived in 2005 as a place to download nature/topological themed wallpapers with edits from selected designers. All of the wallpapers are available to download in multiple sizes and are completely free. In just the 2015 exhibition there are over 90 wallpapers available, head over to the website via the link at the bottom of the article to check out the rest of their collections.
Designers and developers spend about 90% of their waking life in front of a computer so the most appealing genre for a wallpaper would be one that has beautiful design mixed with the all important aspect of being outdoors.