The shards must be vibrating the very bones of the graves. You are almost sure you can hear scratching and clawing from the inside of the mausoleums.
The Ghoulish Badge is 185 yards east and slightly north of the Ground Zero neighborhood in Bloody Bay near the center of the map. There is a small building with a tunnel through it over the stone walkway. The badge marker is inside that small building.
Its coordinates are (91, 65, 360).