I saw something of the sort written in some documents I chanced upon during my visit to Draklor. The Naldoan Sea, the Ridorana Cataract, and the Pharos Lighthouse. I sent my fleet to fish out the truth behind these words... and caught trouble.
The Jagd Naldoa is a region in the land of Ivalice in Final Fantasy XII. It is Jagd territory, and thus airships cannot travel over it. Only when an airship is outfitted with a special skystone can it travel over jagd. The region is mainly ocean, with only a few islands on its surface.
A giant hole in the ocean. It is so deep, it draws in water from all around, creating furious tides. This, combined with the Jagd effect, makes it impossible to reach the island located on the cataract's edge by conventional means. The island located there looks like it has had a part of it ripped off, indicating there could have been more to it before the cataract pulled it down.
A giant tower that rests just on the cataract's edge. At the top is the Sun-Cryst, the nethicite made by the gods and given to man so that he may shape his history. The Cryst gives off an eerie light from the top of the tower, which is how it received the name, The Pharos.
The tower is well over 100 floors tall, divided into three levels, and is infested with monsters, the perfect place to store the gift of the gods. The only people who are permitted to set foot here are the Dynast King, Raithwall, and his descendants, such as Princess Ashe. The Sun-Cryst is guarded by an esper, Hashmal the Bringer of Order. It also has a lower section called the Subterra.