So, I just thought I'd do that here. I hope this doesn't qualify as objectionable, if it is, then someone just delete it ... thanks.
There is this artist (named Vlad) who creates some of the most amazing artwork. It is beautiful, whimsical, breath taking ..... just wow stuff.
There are a lot of pieces that are available as free wallpaper. However, I sprang for the lifetime membership (you get signature free artwork, and higher quality resolution downloads).
There are thousands of wallpapers on his site. You could change your wallpaper every day for a few years and never see the same thing twice.
Anyway .... I highly recommend it. It's worth looking at even if you don't sign up ... unless you are into porn, then I would say skip it, because there isn't anything even remotely like that there.
http://www.vladstudio.com/home/