Thank you :).
Printable View
I just noticed this... The colors of the men's garments complement the green and brown colors of the structure... This is another reason why I really love this image...
A further reason this image works for me is that the vertical and horizontal lines of the structure are straight and do not keystone.
I made a subtle change by adjusting the CS6 burn tool to 50% opacity and painting over the men, This slight modification seems to help these two men stand out from the background.
https://rpcrowe.smugmug.com/photos/i.../i-xWXXWfh.jpg
You should really print this image and enter the print in a photography contest or two...