The Razorfen Downs are the ancient burial grounds of the Quillboar, on the Southern Edge of the Barrens, covered in brambles and thorns.
The burial grounds have been tainted, as the scourge have taken over much of the area, reanimating the dead.
It seems that the naive quillboar made a deal with the Lich King and the scourge and have now been over run – their high priests have been killed and destroyed and the place is run over by a lich who maintains a direct link with Ner’Zhul, Amennar the Coldbringer.
The Bone Pile itself is part of a truly epic vanilla WoW scene. Mordresh Fire Eye sits atop a massive pile of bones, crying out and preaching scourge propaganda to a mass of dancing, cheering skeletal bodies.