I think this theory deserves its thread but I just haven't posted a thread. maybe we Moderator will go through this…
Do you know the myth of a world at the center of the earth?
Luffy has traveled on the sea, in the sky and under the sea. so what would make his trip even more incredible?
I think I have found a lot of arguments that go in this direction.
First I think the name of Reverse mountain is not just for the currents that climb the mountain but for an other thing… maybe there is somthing under !!
In the flash back of sanji Zeff said "All blue exists, go to grand line when the time come" so if All blue exist, it doesn't need to be created??
Montblanc Cricket said about the knock up stream a theory said "there is a huge cavity under the earth".
Ener's mini adventure shows us that a city existed under the surface of the moon so why not underground?
Neptune said "they are many theory about the Eve tree, her roots only illuminate this place" but where is the tree? if the "théory was falls and he is'nt at the surface but in the underground?!
and wouldn't it be a shame that Luffy's adventure begins on the grand line in, what sanji calls "a mountain" which was in fact Laboon with a "world" created by Crocus inside, to end in a mountain contiguous in a world in the center of the earth?
So laugh tale is may be at the center of the earth, with All blue and the eve tree, accessible by a secret passage at the end of the Grand Line, at Reverse Mountain, where the 4 seas of the world meet.
I have many other élements.
If u want, i let u the link of my vidéo who have all the élements!
Don't forget to acrive subtitle, there is in english and spanish !
Enjoy