Cocoon

Cocoon is said to have been built by the fal'Cie many centuries ago to protect humanity from the savage world of Pulse. The current population of Cocoon is said to number in the tens of millions, although the exact figure is unknown. Cocoon is home to many futuristic cities, such as the capital city of Eden, the port city of Palumpolum, the beach town Bodhum, and the carnival city of Nautilus. There are also expansive highroads located in the Hanging Edge, the exotic nature reserve of the Sunleth Waterscape, and a lake called Bresha located on the outer-rim of Cocoon. However, due to the fall of the fal'Cie Anima, the water of the lake has been transformed into crystalline matter. Now with falling into this world, some places lay in ruin and are no longer accessible unless you find a way through.