Attack on Titan , is a Japanese manga series written and illustrated by Hajime Isayama. It is set in a world where humanity lives inside cities surrounded by enormous walls that protect them from gigantic man-eating humanoids, known as Titans; the story follows Eren Yeager, who vows to exterminate the Titans after a Titan brings about the destruction of his hometown and the death of his mother.
An anime tv series adapting the manga was produced by Wit Studio (seasons 1–3) and MAPPA (season 4).
[Spoiler Alert]
At the end of Season 3 of the anime, there is a revelation for our heroes that there is more to their world; that it is a much bigger world across the endless oceans. They have been in a secluded island, known as Eldia and that there is a land, known as Marley is across the ocean.
Hajime Isayama opens our eyes to a new world, following a map. A map that contain their world, but a secret easteregg to our own world. If their world map was flipped upside-down, then our world map will be revealed, showing the southern coast of Africa and more.
As Season 4 continues to show more about the world. Fans have theorized and created a World Map following events in the story and an easteregg to our own.
Did you notice the hidden secret easteregg before?