The Circle of the Sun

Deep in the forest northwest of Khorinis, far enough off any path that most people have never seen it, stands an ancient circle of stones. The Fire Mages used it for rituals once. That was a long time ago. No one maintains it anymore, no one visits it, and the forest has been growing back over it long enough that the stones look like they belong there now.
It was built for a purpose that has nothing to do with the people currently living on the island. That purpose is not yet finished.