The bay on the western coast where the rivers of Aphenlein empty into the South Sea. Thrumbling Bay earned its name from the sound—the constant low rumble of water flowing from dozens of river mouths, creating a background noise that visitors describe as both soothing and unsettling.
The bay itself is shallow, the water brown with silt, the coastline a maze of river deltas and mangrove-like vegetation. This is not a natural harbor—ships cannot easily approach, and there's nothing to approach for. Thrumbling Bay marks the edge of the navigable world. Beyond lies only the endless green of the Aphenlein, and beyond that, the hostile heights of Seyiy.