The Sewers of Coruscant were a complex of sewers located on Coruscant. The sewers were connected to various buildings on Coruscant and had entrances in them, such as the one in Xizor's Palace. They were heavily guarded by the Red Guard corps. Dianogas inhabited the waters of the sewers. A giant dianoga was rumored to inhabit one of the main chambers.
Prior to the Battle over Coruscant, Luke Skywalker, Dash Rendar, Chewbacca, Lando Calrissian, and Benedict Vidkun used the sewers to access Xizor's Palace.