A lot of anime have interesting power systems and strong protagonists, but creating an entire world that feels alive is a completely different achievement.
I'm talking about worlds with their own history, politics, cultures, mysteries, power structures, and consequences that actually affect the story.
Some examples that come to mind are:
One Piece — its interconnected islands, history, and mysteries.
Made in Abyss — its unique world and the secrets surrounding it.
Overlord — its kingdoms, political conflicts, and different perspectives.
Attack on Titan — how the world's history changes your understanding of the story.
Mushoku Tensei — its geography, cultures, and fantasy setting.
But I want to hear your picks, too.
Which anime has the best world-building in your opinion, and what specifically makes its world so convincing?
Bonus question: If you could get transported into one anime world, which would you choose, knowing that you'd have to live with its dangers and disadvantages rather than just enjoying the protagonist's powers?