The Larsius River is a short, north-flowing river that begins at the border of Elsweyr, passes through and wraps around the city of Bravil and empties into Niben Bay. (map)
Bloodmayne Cave lies a short distance from the river's northwestern shore, while a few Nirnroots can be found scattered across the northern shores and the banks around the city of Bravil. The Ayleid ruin Anutwyll is a little northeast of the river.