From PathfinderWiki

Withershin is a stretch of prairie in the Nesmian Plains of Nirmathas, characterized by several artificial earthen mounds. There are no established histories of the creators of these mounds, though the obvious candidates are either fey creatures or the Kellid tribes that lived in the area before Taldan colonization. The most prominent inhabitants of Withershin are a tribe of druidic centaurs, called the Withershins. Other traveling centaur tribes go out of their way to visit this tribe to pay tribute.1


  1. Crystal Frasier. “The Nesmian Plains” in Trail of the Hunted, 69–70. Paizo Inc., 2017