This piece I did in about 6 hours, blocking it it with basic photoshop brushes, then overlaying photos and textures, then paiting back into it.
It's always amazing to me when massive structures, be they 'art' or dinosaur bones, are hung by just wires..the bigger they are, the more tense the environment. So here I imagined a civilization hanging a massive robot, kinda robotech looking, with the only thing working is the light in the eyes. Why they wouldn't stand it upright, I have no idea!