This extensive network of tunnels lying beneath the Wajaom Woodlands is covered in subterranean plants, ranging from vines to ferns, fungi, and moss, giving the caverns a unique vibrancy unseen on the surface. The Aydeewa Subterrane was once a site of the ancient Olduum civilization until sinking almost completely into the ocean. However, traces of the past can still be seen in the stone pillars and altars scattered about the area. The Empire of Aht Urhgan maintained the caverns until recently, when the increasing beastman threat forced them to withdraw. Now the Aydeewa Subterrane is plagued with Qiqirn and Mamool Ja thieves looking for treasure among the ruins.