The Plane, also known as Gaia is made up of three continents; east, west, and one in the north. It's not simply a planet in space, it is a living organism from which all living creatures are born and to where they all return when they die. Its life blood is the Lifestream, a flow of energy that contains all the knowledge of all the creatures that ever lived on its surface.

The world has no known name, yet is diverse as it is large. It is covered in large parts by water, and is composed of three large continents and several islands of varying sizes.

It consists of four major continents: the Mist Continent, the Outer Continent, the Lost Continent, and the Forgotten Continent. The vast majority of people in Gaia live on the Mist Continent, and very few travel to, or are even aware of, the other three continents that make up their world, largely because the main mode of transport, airships, run on mist, and mist only exists on the Mist Continent, meaning they cannot fly to other continents.

Greatly resembling a single large island, Spira is composed of one mainland continent with several smaller islands to the east, west and south of it.

Ivalice is an entire geographical region in the unnamed world. It consists of three continents: Valendia to the north, Ordalia to the west and Kerwon to the south. The region is populated by a handful of unique races, each with its own culture and traditions.

This world takes place in seems very similar to the real world, with modern technology such as cars and highways being visible. The world also contains medieval elements, such as castles and armored soldiers.