An interesting shot. What makes it interesting is the chain and lock. I actually did not notice it the first time, and took a bit to see it here this 2nd time. I think that is really the key to the shot. I think an 8x10 crop would have given it a bit more focus, taking the top off slightly. Other than that it is a well composed shot. I like the slight cruves in the pillars and the nice repeating patterns in the door. A simple composition that actually has more going on to it after a 2nd take.
Nice find in seeing this. I think it would work better if you cropped it down to exclude the "ceiling". Nice POV on this, and it's well focused, etc... Good luck in the challenge.