The Mass Grave, or Mass Graveyard, is Abigail's unofficial 'home'. She rises from one of the graves after supposedly being dead due to the help of the Cool Witch's. Though, they could have been lying about their involvement in her rising and her state before being placed in the coffin.
The Mass Grave is dreary, foggy, and full of gravestones. While wandering, Abigail mysteriously comes across two almost recently deceased people just lying on the ground beside pieces of, what Abigail assumes to be, her own coffin.