Ok, I've gotten enough mileage out of this crazy art project -- this is the last Inversion photo. For this one, I crawled halfway into the tunnel and shot looking back toward the street. Obviously I'm enamored with this cross-processing look, so for those that are anti-Photoshop, here is a version.
I gotta say I like the original better. The cross-processing makes the tunnel look old- with something unfortunate growing on it. (maybe that's what you were going for). Certainly not a bad choice, but thanks for including the original!
Strange art project, truly strange, but enjoyable (I freely admit I'm a realist). As for as PS goes, use every tool in the toolbox, that's what they're there for!