As Catherine noted, it's composed and lit nicely, but not much story to it. I'd try brightening it, though - the background is probably white, but the current version is very gray.
I got a good chuckle when I voted on this photo. Looks perfect for a stock site - I think it would be a good seller. It's well lit, well-focused, and has nice composition. I think the only reason you didn't score higher is that there isn't too much else to do to "jazz up" the subject, and we all know that DPC voters are always looking for that "wow" factor. It's a great, very solid photo, though, and as I said, should do well as stock.
Nice still. My only suggestion is to adjust the tilt as it does not add to the image. On the other hand, the tilt at the lip suggests the weight of future death, i.e. the headstones. Good job.
If the lighting in this was stronger (it's underexposed), this would present itself much better. Simple to fix with various tools (wht/blk point, levels, curves, histogram).