Native wallpapers disappeared from my MacBook?
So I formatted my mac two days ago, it was running mac os 10.9.2 before I did it and so is it right now. But one thing seems to have gone wrong because the native wallpapers are gone. The standard desktop images folder is still there, but the other categories such as nature, art, b&w, and etc are not. Has anyone experienced this before and has any clue on how to find/(perhaps download) these images?
I have tried going to /library > desktop pictures and they aren't there either.