This is the world where the first part of book 8, once we figure things out and get book 7 up, takes place. It's the home of one of the seminaries for the Camp of Ahisma, as described in book 4, as well as the most presitigous Arboc Forces academies. It's also home to the Roharrin, a large pack animal that's totally wild, fearless, and cannot be trained.

Notice the dark spot? That's the reason they went there.