The Willow Jungle is located at the foothills of the Cyclopean Mountains. In it lies a Stone Circle summoning. It is here, during The Gunslinger, that Roland Deschain and Jake Chambers encounter the Demon Elemental. Upon Roland's second meeting with the Demon, Roland sleeps with it in order to get answers. The Demon takes Roland's semen, which would later be transfered into Susannah Dean during The Waste Lands to help Mia birth Mordred Deschain.