The Larsius River runs through the Cyrodiil city of Bravil. It is described by Alessia Ottus in her book, Guide to Bravil, as having "fetid channels that serve as Bravil's sewers."[1]
It runs from the Niben Bay and Bravil to Cyrodiil's border with Elsweyr.
The Larsius river is important to Bravil's trade. However, Niben Bay is more important, as it surrounds the city.