An archipelago in the northwestern part of Golarion, Argonessen suffers a thin veil to the evil planes of the Abyss and Hell. Some Humans of the islands have become Tieflings. Exhibiting a nature similar to the more align denizens of those realms. Argonessen is made up of numerous islands ruled by city states and various kings of each. Though not all islands are claimed, they run as small kingdoms unto themselves, although the people from different islands still consider themselves to all be Argoss.
Argonessen is probably one of the few places where worship of the Dark Six is not frowned upon. It is a land of monsters, demons, devils, gladiators and heroes.