The One Piece Earth is hollow and there's a sun within. Everything is connected: underground civilization in the Moon, Gedatsu cover page with the whole digging story, the giant whole in Enies Lobby/Lulusia(caused by Mother Flame) and the people coming from inside the earth through some sort of elevator in chapter 1138.
- The concept of a hollow Earth still recurs in folklore and as a premise for subterranean fiction, a subgenre of adventure fiction. Some adventure fiction also satisfies the literary definition of Romance Fiction(Romance Dawn).
- Oda is taking inspirations from the theory of the hollow earth(journey to the center of the Earth) and the Agartha Kingdom(a kingdom inside the Earth).
- In the legend of Agartha, a mythical kingdom located inside Earth, there's a sun that always shines and the weather is always like late spring or early summer.
- We can also see in the double page of chapter 1138, people coming from what looks like inside the earth through a elevator carrying some sort of energy(the energy of the sun inside the Earth).
- Within the Earth, there is a flame. People succumbed to desire, as they seized the forbidden sun(people started to use the energy of the sun within Earth).
- In ancient times, the concept of a subterranean land inside the Earth appeared in mythology, Folklore and legends. Such as the Greek underworld, the Christian Hell and the Nordic Svartálfaheimr. The idea of a subterranean realms is also mentioned in Tibetan Buddhist belief(Oda loves to make references to Buddhism). Where there is an ancient city called Shamballa which is located inside the Earth.
- Luffy and the crew always got to the most crazy places in the world like deep under water, sky high, but never deep underground.
There's also an animated Japanese movie about Agartha, it's called Journey to Agartha(aka The Children Who Chase Lost Voices).
- The concept of a hollow Earth still recurs in folklore and as a premise for subterranean fiction, a subgenre of adventure fiction. Some adventure fiction also satisfies the literary definition of Romance Fiction(Romance Dawn).
- Oda is taking inspirations from the theory of the hollow earth(journey to the center of the Earth) and the Agartha Kingdom(a kingdom inside the Earth).
- In the legend of Agartha, a mythical kingdom located inside Earth, there's a sun that always shines and the weather is always like late spring or early summer.
- We can also see in the double page of chapter 1138, people coming from what looks like inside the earth through a elevator carrying some sort of energy(the energy of the sun inside the Earth).
- Within the Earth, there is a flame. People succumbed to desire, as they seized the forbidden sun(people started to use the energy of the sun within Earth).
- In ancient times, the concept of a subterranean land inside the Earth appeared in mythology, Folklore and legends. Such as the Greek underworld, the Christian Hell and the Nordic Svartálfaheimr. The idea of a subterranean realms is also mentioned in Tibetan Buddhist belief(Oda loves to make references to Buddhism). Where there is an ancient city called Shamballa which is located inside the Earth.
- Luffy and the crew always got to the most crazy places in the world like deep under water, sky high, but never deep underground.
There's also an animated Japanese movie about Agartha, it's called Journey to Agartha(aka The Children Who Chase Lost Voices).
