I am a Linux Mint user and to date I remembered that in previous versions of the distro the backgrounds of all versions of Linux Mint, so even if it had the latest version of the distro it always placed the wallpaper of the version Daryna, with its particular from freedom came elegance. En Linux Mint 18.3 Sylvia do not have preloaded wallpapers, but downloading them is extremely simple.
In Linux Mint 18.3 Sylvia we have 90 funds available, which we can extend with the already popular tool Linux Mint Funding Online, these default funds can be supplemented with funds from previous versions by executing the following command:
sudo apt install mint-backgrounds-*
With this command we go to iInstall the backgrounds packages of the serena, rebecca, sonya, sarah, katya, nadia, rafaela, qiana, retro, rosa, petra, olivia, sylvia, maya versions and the packages prepared for the xfce versions.
Once the variety of wallpapers is installed, we simply have to go to the Appearance preferences, select the wallpaper that we like the most, choose the presentation style and begin to observe how our desktop has a new appearance.