Erebus

From the White Wolf Wiki, the most complete White Wolf reference

Often compared to Garou "hell," Erebus is actually a place of spiritual cleansing. Erebus is filled with rivers of molten silver which both burn and heal at the same time, extending the torment of the inmates for months, years, possibly even centuries.

Werewolves end up in Erebus when they have become too tainted by one of the members of the Triat, most often the Wyrm. Either the werewolf will journey to Erebus to be cleansed, or will be dragged there by other werewolves.

Erebus is well defended, so the chances of breaking someone out of this place are slim. There is virtually no chance that an inmate will escape before his time is up. The gates of Erebus are guarded by Cerberus, a great three-headed monster hound. Each of its heads refelects an aspect of the Triat. The guards within Erebus are called The Brood and appear to be huge, hairless Crinos Garou with burning red eyes and armed with huge silver spears that burn with fire.