Geralt looking at the Pontar on a bridge leading from Velen to Novigrad in the Witcher 3 Wild Hunt

The Pontar is a river in The Witcher 3: Wild Hunt.

It is one of the biggest rivers of the Northern Kingdoms

During the quest Thou Shalt Not Pass, Geralt needs to acquire a Transit Pass so he can cross the Pontar into Novigrad and Oxenfurt