Durao is an open layer that serves as the embarkation point for many tanar'ri hordes on their way to Gehenna. It consists largely of a set of rusting iron wharves and barracks built between a fetid section of swamps and the sluggish waters of the Styx. When troops march through the sprawling iron streets - which is most of the time - the entire layer seems to reverberate with the sound. The tanar'ri use enormous barges to ship their troops, though the marraenoloths are paid a small fortune to pilot these barges down the river. Other than rusty piers with access to the rest of the Lower Planes and the horrifically deformed creatures of the swamp-land (which the Abyssal lords consider good hunting), the layer has nothing lo recommend it.