I get mine from this site:
http://interfacelift.com/
It has a huge selection of HD picts in various resolutions and screen formats, including for HD TVs. So many are just breathtaking. Just thought I'd pass it on! :)
I found this picture a minute ago. I actually live just a few minutes away from where this was taken! Cool!
And check out this cool snakie pic! (Download various resolutions under "animals" category.)
I love so many of these pics/wallpapers I can't possibly list them all. However, have you found a particular gem? Want to share? Post a link to your treasures! :gj: