Treasure of the Old Gods
The eponymous Seawall Gate is a massive stone wall that defends Seawall’s harbor from invasion. The wall blocks entry to the harbor from all but one massive, clockwork gate that remains open to allow safe passage for ships. Watchtowers dot the wall with massive hearths to light the way at night. The tops of these towers also host rotating ballistae for defense. The wall also contains holes through which cannons may be posted to defend the city gate.