"On the far side of the clearing was a vast hill of bones. They gleamed like stripped branches in the last of the watery daylight, some tiny shrew bones hardly bigger than teeth, others as big as the leg bone of a fox or a badger."
During his leadership ceremony, Firestar suddenly sees a massive hill of bones appearing in the clearing, consisting of both prey bones and cat bones, with a river of blood pouring out of the middle. The bones gleam, and the blood begins to drown Firestar.
When Firestar, Ravenpaw and Graystripe sneak into the newly joined TigerClan camp on RiverClan territory to check on Graystripe's kits, they see the Bonehill in the real world for the first time. It is a mound made of bones that gives the TigerClan leader a place to look down on their Clans, much like the Highrock in the ThunderClan camp. However, it is made only of prey bones, not cat bones, as Firestar saw in his dream.