As is known, the Ubuntu developers before each new release announcing a tender Wallpaper among users for further selection and installation of the best shots in the distribution by default, the program's appearance (Design).
Currently, Ubuntu 14.04 users have already submitted in a large number of Wallpaper, of which 95 were selected the most beautiful Spanish developer of My Weather ( Lorenzo Carbonell - atareao) and Packed in one deb package for those who wish to download.
Sorry for the spelling and phonetic errors in the text.
Owner and main writer of MintGuide.org is not a native English speaker.
To download a package from 95 beautiful competitive Wallpaper Ubunru/Linux Mint and derivatives can use the following link: 95 competitive Wallpaper Ubuntu 14.04
After installation, open system Settings ->appearance (Design) and choose to display on the desktop: