Every distro has its extra backgrounds package or collections. Fedora isn’t an exception.
Here there’s an article about that package: https://fedoramagazine.org/try-out-the-additional-wallpapers-for-fedora-23/
And here’s a screenshot of my own desktop using one of this extra backgrounds (Super Flat Remix icons & Sidi-Boujafaar Beach desktop theme:
If you think 86MB is a ridiculous size for just 16 wallpapers, I’m uploading them to Google Drive and posting the link later on. Promised, it’s going to be way lighter.