Ok, I think I can see it now. I was looking at the map wrong, looking at the pdfs and couldnt really see how 11, and 21 was connected.11 is the whole graveyard, which is bordered on one side by the hill.
“In the side of the hill are crypts excavated for the dead. Most of them are empty caves today, but behind an overgrown stone gate you can find the intact grave of Count Nepola (see The Crypt).“