This started off as a mostly human-made structure in concept, but I decided to make it more organic in the end. Cool colours again, must be the heat getting to me.
Edit: Made characters in foreground a little bigger and moved a few elements. Reduced contrast on central area. Thanks for the crits, guys!
Edit: Step by Step tutorial available
Time: 5-6 hours
Tools: Photoshop CS2 & Wacom Intuos tablet