This is mostly an idea for using up those blasted cellar stones... soooo many cellar stones...
The one that I would like most would be a Lich Wall (also known as a field stone wall) meant to separate the graveyard from the rest of the world, keeping the dead in, and the living safe outside. Could also double as a nice mid-grade defensive wall, or be even shoddier than the Palisades, I'd build one just for the aesthetics of it.
Assorted headstones, we have that now with the rune stones, but having a sculpted headstone would give graveyards that much more of the desired "feel."
The ability to dig "graves" and inter the dead, perhaps with gifts for their afterlife. (Shovels, even the wooden ones that grave diggers use, that's right, wooden shovels. They don't make noise while digging, allowing for the caretakers to dig graves at night without waking up the neighborhood) ((Which would also open up a new profession, grave robbing))
Alternatively, funeral barges could be neat as well.
All this because I have had my first drowning, and would like to honor my "ancestors."
What do you think?