Here's another photo I touched up:

Original: http://www.yuppicide.com/other/hawaii/p1010290.jpg
Edited: http://www.yuppicide.com/other/hawaii/lavaflow.jpg
Process: Applied some saturation. Duplicated layer. Made lava more redish/orangish with Color Balance. Erased out the volcanic ash/dirt. Flattened. Duplicated layer. Made volcanic ash/dirt more colorful. Erased out lava. Flattened. Saved.

One last one:

Original: http://www.yuppicide.com/other/hawaii/p1010019.jpg
Edited: http://www.yuppicide.com/other/hawaii/gecko.jpg
Process: Applied some saturation. Cropped picture. Duplicated layer. Upped the green and yellow with Color Balance. Erased everything but green/yellow. Flattened. Duplicate layer. Upped the red/magenta. Erased everything but red/magenta. Flattened. Saved.

I really think this one came out decent. The wood looks so much more lifelike almost like I was still there.