Strictly speaking, calling it a building isn't quite accurate, because the end of this corridor is already at the edge of the World Tree.
The interior of the World Tree is roughly a hundred meters tall, and at the end of the corridor sits a structure built into the wall at the tree's outer edge.
The whole building is embedded in the wall, like those mountain hotels from a thousand years ago, where they hollowed out part of a mountain to build a hotel inside.
More plainly put, it's like someone carved out a few windows and doors in the wooden wall at the edge of the World Tree, making that section of wall look like a building.
"That… must be where the administrators of this World Tree are based." Lou Fei'Er guessed. "Are we supposed to get out through there?"
"Looks that way." Jin Yue nodded lightly.
"Eeh…"
Keke shrank down her little head, a bit scared.
