buildzion.com

The most scenic free wallpaper we found is at:

http://www.terragalleria.com/wallpaper-samples/wallpaper-samples.html

 

 

It is the showcase of QT Luong's photography, and he offers a sampling of his images for free. Our favorite is Redwood National Park.

Also, be sure to check the Hubble Space Telescope Wallpaper:

http://hubblesite.org/gallery/wallpaper/

We even have our own NASA wallpaper to offer:

http://buildzion.com/downloads/NASA-Apollo8-Dec24-Earthrise2-1280x1024.jpg