The door was between floors fifty-one and fifty-two.
Not in the transit corridor exactly — adjacent to it, the way a room was adjacent to a hallway, existing in the dimensional space that the Tower's transit architecture used as structural filler between active floors. Most climbers passed through transit corridors without perceiving the filler space. Most climbers didn't have a fable density profile that made the Tower's secondary architecture visible as something other than ambient grey.
He felt it the way he felt fable layers inside standard floors — a quality of presence that didn't match the surrounding architecture, the specific sensation of a space that had been built with intention sitting inside a space that had been built as infrastructure.
He stopped walking.
