Location from Attack on Titan by Hajime Isayama
An interdimensional space connecting all Eldians and Titans. A desert of sand beneath a starless sky, where time has no meaning and a giant tree holds the Coordinate.
The Paths exist outside of time, outside of space, in the place where all Subjects of Ymir are connected by invisible threads. It looks like a desert — endless sand stretching to every horizon under a sky with no stars, no sun, just diffuse light from nowhere. At the center stands an enormous luminous tree, the Coordinate, where Ymir Fritz has been building Titans from sand for two thousand years. She builds them one grain at a time. She has had a lot of time. When a Titan Shifter inherits their power, they pass through the Paths. When the Founding Titan activates, it reaches through the Paths to touch every Eldian alive. Memories flow here. Wills clash here. Eren and Zeke had their final argument here, walking through their father's memories while Ymir watched and made her choice. The Paths are where freedom is both promised and revoked.
Also known as: Paths, the Coordinate realm, the sand desert