From Ardrana

Sylvania is an enchanted forest, nominally in the western part of Tanilon along the southern slopes of the Onyl Mountains. One of the few true sylvan forests of Ardrana, it is the sacred forest of Gaiya, Ardic goddess of the earth, and is hidden from the view of those who are not welcome. However, over the past few years, it has experienced some troubles, the nature of which remain mysterious, as those who have fled its boundaries have been unwilling to discuss the situation.