When I first looked at this I thought it was IR too (or a photoshopped equivalent)! It certainly gives it a "feel". With the crop that others have already suggested, it makes a very nice and slightly unusual image. Re the lettering, I have found that light from the side will tend to bring out detail on things like headstones - can you get back there when the sun is shining across it from the side? (this also works for things like tree bark)

Cheers
Mike