Grand Line - The One Piece Wiki - Manga, Anime, Pirates, Marines, Treasure, Devil Fruits, and more
↑One Piece Manga - Vol. 3 Chapter 22, Nami explains what the Grand Line and the Red Line are. ↑ One Piece Manga and Anime - Vol. 6 Chapter 51 and Episode 3, The geography of the One Piece world is explained. ↑ One Piece Manga and Anime - Vol. 45 Chapter 4...