The Ithmia is the collective term used to describe three temperate forests - the Western Ithmia, Eastern Ithmia, and Northern Ithmia, divided physically by the Zaphar River and categorically by variations in plant and animal life. This collective term is referenced in various places, the most well-known being the city-state of Hashan, whose former title is "Crown of the Ithmia."
Within the Ithmia lie the city-states of Hashan and Eleusis, as well as the hamlet of Bagwar's Copse, the fortress of Forest Watch, and the temple of the goddess Gaia.