The Omashu delivery system is a complex system of chutes that are used to transport mail and packages throughout the Earth Kingdom city of Omashu. The system consists of a series of slides and chutes through which various parcels travel in order to arrive at a certain destination. It is powered by earthbending and gravity; earthbending sends the packages up the slides, while gravity moves them down. The slides are outfitted with numerous loading points, which also operate through earthbending.