The Jagd Difohr is a region in the land of Ivalice in Final Fantasy XII. It is jagd territory, and thus airship travel over it, using regular skystones, is impossible. The region is covered mostly in forest, but deep within, lies an ancient city.
The Golmore Jungle
Village of the Viera, situated deep in the Golmore Jungle. Entrance by any other race is impossible. Only Viera, who can speak to the Wood, may reveal the path to the village. The village is more of a meeting place for the Viera, with only the tribe's elder actually taking up permanent residence here.
A thick mist covers these woods. Many people have tried crossing them, only to get lost forever. At the end of the woods is a giant gate, which can only be opened when a person has walked the path of illusions. Even then, the person still needs the Gigas to open the gate fully.
The lost Holy City, once home to the gods, the Occuria. However, several centuries ago, the Occuria sealed up their city and left the realm of mortals. As such, the city fell into decay, with only monsters roaming its many halls, and a thick mist covering every area.