Windows XP was the most blissful iteration of ... After all, it's arguably most famous for its signature "Bliss" wallpaper depicting a rolling green hill, deep blue sky and little fluffy clouds.

The photo you see above -- the default wallpaper for Windows XP -- is probably the most recognizable image in the world. What you probably didn't know is that it's a real photo, called Bliss ...

The picture known as "Bliss" soon became one of the most viewed photographs in the world when it was set as the default desktop background in Windows XP. O'Rear took the photo on film with a ...