This old fortification was built on a small island in the Nentir river to guard the city from any waterborne attack from the north. It fell into ruin even before the sack of the old city, and now is little more than an empty shell overrun by mice and birds.
DM Tip: According to local legend, the tower was once a prison for nobles who were too well connected to be killed out of hand or mistreated. The ghost of an evil princess who dabbled in demon worship haunts the tower. You can build your own small dungeon beneath the ruins, featuring a wrathful specter and minor demons.
Plot hook: Bleak Disciples have penetrated the city and set up operations in the first basement level.