I took this picture while exploring a dismissed industrial area in Milan (Italy)
I did standard PP work in LR and then pumped up saturation on the yellow channel, desaturated a bit the greens and eliminated some color casts from the wall, which now is almost gray
Finally I used Nik Color Efex to increase contrast on the wall.
I like the "Easter Egg" aspect of this one. The visual payoff for scanning over all the mundane and uninteresting content is refection in the window on the right. Off center compositions work more effectively when there is interesting context to scan over en route to the finding the focal point. When I'm compelled to scan over or wander off into too much uninteresting space it tends to dilute the impact of the focal point for me. Playing with it I like it better cropped so the shrubs are more balanced on either side and the composition is more static than the off center composition...
I also played around with your Aruba shot for a similar reason. It had two centers of interest — shore and boat — with a huge expanse of uninteresting space between them. In a photo that creates a ping-pong effect because both can't be focused on at the same time.
Initially I tried to make the crop more panoramic to make the short and clouds connect better to pull the eye right instead of up to the sky.... http://super.nova.org/EDITS/Aruba1.jpg
...but the boat was still too far away to connect effectively with that path and equally importantly connect back to the shore in a circular path, which compositionally invites a second look. So I moved the boat closer to the shore where the similarity between the curve of the shore and the wake of the boat is easier to see and after seeing the boat its easier to jump back to the shore for a repeat trip around the photo... http://super.nova.org/EDITS/Aruba2.jpg