Doubletake: Yes, it's on Earth.
It took me a while to come up with a title for this one. If it was darker and redder, it would look like Mars. :}
In honor of Earth Day, April 22, NASA has compiled ten of the most outstanding images taken from space and this is one of them:
http://earth.jsc.nasa.gov/EarthObservatory/Harrat_Khaybar_VolcanicField.htm
The good thing is that our planet can still teach us how some of these ancient geological processes occured. Great photo.
('One' of my favorites... and the Richat structure.. atolls... )