Libya probably had the most interesting features, relief-wise.  There was a bit more for the eye to see, and the enhancements brought out even more detail.

 

This image is hybrid- before/after of an image from this gallery.  The "Before" image is really what the scene looked like to the eye from the airplane.  The "After" image looks so much like Mars, or even Venus pictures taken by a NASA spacecraft.

 

 

The enhancement was really simple- I simply used a tool called Photo Impact, and then only Version 4.0, which is very much out of date.  However, it was simple to use and I just told it to automatically adjust brightness and contrast, and this was the result.  For some reason, Adobe's Photoshop has never done a good job with automatic brightness and contrast.  Strange that such a good piece of software in nearly every other way is so deficient in such a basic task.