I'm curious as to why you chose this as your best photograph... does this particular tomb hold something for you? As a photograph, I find it flat, and too centred. My eye comes into the frame, looks into a dark hole, and leaves. Maybe a different angle would work this a bit better. As well, it looks like you used the on-camera flash... perhaps a bit of diffusion would soften the effect to give a nice glow, instead of harsh light. If this area holds interest for you, please go back and try some different things... work the angles, try coloured gel on your flash.... it looks like it has potential.
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