Xubuntu Wallpapers Download?

This OMGUbuntu article has links to all the 16.04 Xubuntu wallpaper contest wiers.

Here's the official page with the images: https://xubuntu.org/news/xubuntu-16-04-wallpaper-competition-wiers/?utm_source=omgubuntu

You can also install them:

sudo apt-get install xubuntu-wallpapers

or

sudo apt-get install xubuntu-community-wallpapers

(if it exists)