I love a good cemetery photo - and this one seemed to be calling out for a touch of Tim Burton!
After masking out the church & converting to a line image, I used tone-mapping to bring out the graveyard detail, and an overlay of crumpled paper provides the 'almost' fog detail.
credits for the additonal elements from http://www.deviantart.com (under 'Resources and Stock images') are:
sketchbook scribble brushes by InvisibleSnow
TimBurton brushes by LadyCahh
burton_esque by byrdie2485-d3irtp
tree_brushes by Gurly