Cocoon

Like a low-hanging moon, with a large piece taken out of it, giving a view of the hollow inside, where the inhabitants of Cocoon actually live, on the inside of the shell. It is a futuristic paradise protected by advanced technology against intruders from the planet below. It is ruled by the Holy Government and its army.

Cocoon is said to be built by the fal'Cie to protect humanity from the monster-infested Pulse. A lake is located below Cocoon. However, due to the fall of a mysterious, ancient construct, the water of the lake has been changed into a crystalline matter. The nature of this construct is currently unknown.