The forest was likely located somewhere in Florence as Dante Alighieri lived on an estate not far from here. The forest was traversed via a series of mirror portals, not unlike the ones seen in Gluttony.
On his return from The Crusades, Dante made a camp here and sewed a tapestry onto his chest. He proceeded to wipe out all opposition that rose from the depths of Hell. Deeper in the forest, he found the Avenger who managed to escape.