I thought I had seen another thread on this but can't find it. Maybe it was a different forum but please forgive me if I just didn't search well enough.
I ran across an amazing picture that I wanted to share. Currently I have it set as my desktop picture. I also just saw a post with a picture of Shasta dam that someone mentioned would make a nice desktop. Maybe others have some pictures they would like to share.
Anyway, here's my current favorite. Every wondered what a volcano looked like from space?
http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=38985
Jerry