My remark here is not meant as a critique on this picture, it is just a thought for my own improvement that I wanted to share as food for thought.
I love the subject, which clearly has difficult surroundings and light. Worth revisiting and exploring.
In composition I would have put more of the vault, seems more interesting then the floor.
The main improvement could come from light though, seems to me this would be a good setting to use multi flash set-up to give the picture more depth.
Nice to get someone else's view on a picture.
The wall's were inside some archways, so light was tricky, and had to stand back just a bit to get all the picture in the shot.
As this was in a part of the city where using a DSLR with extra lighting is not really a good idea, if you know what I mean.
(locals would have the teeth out of your mouth if they could get money for them)
Early in the morning with point and shoot camera in my pocket, head down, take pictures, before any of the locals wake up.
This is where the pictures were.
