I found this site a few months ago; it's fairly interesting. It's a decent mixture of famous photos you've probably seen before and some you might not have. Most images are fairly high resolution so I recommended only clicking on "original resolution" if your computer has a fair bit of free RAM. My browser memory usage shot to 2.5Gb when viewing one of the pages with the images set to their highest resolution.
I've linked the photostream as well as some of the pictures in their full resolution below.