Another world (異世界, Isekai?, lit. Different world) is a recurring story element in the Final Fantasy series, which focuses on transporting the protagonist(s) to a different world where the characters have little to no knowledge about, giving them and the players the feeling of being in an unknown world.
Similar to the game's predecessor, Luso Clemens is transported to Ivalice with the power of a mysterious grimoire.
Dissidia Final Fantasy (2008)
Wonderland is another world connected to an alternate version of our real world. The beginning of the story has the twins Ai Hayakawa and Yu Hayakawa journey to Wonderland on an Interdimensional Train in search of their parents, researchers of Wonderland who never returned on one of their trips.
The anime was originally planned in two chapters, with the first half mostly set in Wonderland and the second in the real world. Due to financial reasons the anime only animated the first half, while the second half was adapted into other media such as Final Fantasy: Unlimited After.