spoiler comming
.
.
.
.
.
.
.
.
.
.
.
It's the activation points of one of the 3 retro dungeons (small hidden cubed dungeons) - if you activate all - 5 - runes (on 5 headstones) it then activates a "place specific item" area (it does light up, if you look at it in the night), but it's in the southeast corner of the inner graveyard (move the mouse until it becomes a hand. - the item needed is a normal plain dagger. when you put the dagger in it activates a mushroompatch south of the cemetary. Walking into this patch it teleports you to a small dungeon.
If you search the forum you can find links to the dungeon maps, and how to activate the others, because they are fun but confusing, as the automap is screwed here (on purpose I guess)
Like you I must confess I needed help, because I also found the runes and activated them, I even found the "place specific item" area, but couldn't guess what item to use (and what the outcome would be). Indeed I belived it had something to do with the curse of the cemetary - I don't believe anybody found out by themselves, they must have gotten hints from somebody who help make the game - but I may be wrong.
GodSlayer
|